Charak Samhita – Vimanasthana – Chapter 1 (Rasavimanam)

Abstract

The term Rasa means taste or flavour. Rasavimanam, the first chapter of Vimanasthana in the Charaka Samhita, explains the importance of taste in diet, health, and disease. Ayurveda describes six tastes: Madhura (sweet), Amla (sour), Lavana (salty), Katu (pungent), Tikta (bitter), and Kashaya (astringent). These tastes influence the three Doshas—Vata (movement), Pitta (metabolism), and Kapha (stability)—through their specific properties. Their appropriate use supports health, while improper or excessive consumption can disturb Dosha function and contribute to disease. The chapter also describes eight factors that determine the effects of food and guidelines for proper eating. These principles highlight the importance of choosing food according to individual constitution, digestive capacity, quantity, preparation, and suitability.

Keywords: Rasavimanam, Rasa (taste), Dosha (functional principles), Ahara (food), Satmya (individual suitability), Ayurvedic dietary principles.

Introduction

Rasavimanam, the first chapter of Vimanasthana in the Charaka Samhita, explains the relationship between Rasa (taste), Dravya (substance), and Dosha (functional principles of the body). Ayurveda recognizes six tastes that influence Vata (movement), Pitta (metabolism), and Kapha (stability) according to their properties. Understanding these effects helps in selecting appropriate foods and medicines for maintaining health and managing disease. The chapter also highlights the consequences of prolonged or excessive consumption of certain substances, such as Lavana (salt) and Kshara (alkaline substances). It describes Ashta Ahara Vidhi Visheshayatana (eight factors determining the effects of food) and guidelines for appropriate eating. Furthermore, it explains how the properties of a substance and its interactions with other ingredients can influence its overall action. These principles emphasize the importance of considering the substance, its preparation, quantity, and individual suitability when making dietary and therapeutic decisions.

Important Sanskrit Passages, Meanings And Explanations

Introduction To Rasavimanam

अथातो रसविमानं व्याख्यास्यामः||१|| इति ह स्माह भगवानात्रेयः||२||

We shall now explain Rasavimanam. Thus spoke the revered Acharya Atreya.

इह खलु व्याधीनां निमित्तपूर्वरूपरूपोपशयसङ्ख्याप्राधान्यविधिविकल्प बलकालविशेषाननुप्रविश्यानन्तरं दोषभेषजदेशकालबलशरीरसाराहारसात्म्यसत्त्वप्रकृतिवयसां मानमवहितमनसा यथावज्ज्ञेयं भवति भिषजा, दोषादिमानज्ञानायत्तत्वात् क्रियायाः| न ह्यमानज्ञो दोषादीनां भिषग् व्याधिनिग्रहसमर्थो भवति| तस्माद्दोषादिमानज्ञानार्थं विमानस्थानमुपदेक्ष्यामोऽग्निवेश! ||३||

After examining a disease’s causes, early manifestations, signs and symptoms, therapeutic suitability, number, predominant factors, classification, variations, severity, and duration, the physician must carefully assess the Doshas, medicines, geographical region, season and time, strength, body constitution, tissue predominance, diet, individual suitability, mental condition, constitution, and age. Treatment depends on understanding these factors. A physician who does not assess them properly cannot effectively manage disease. Therefore, this section explains the principles required for such assessment. This passage establishes individualized assessment as a foundation of Ayurvedic practice. Two patients with similar complaints may differ in age, strength, digestive capacity, constitution, disease severity, and tolerance to medicines. These differences influence the selection of treatment and its intensity.

The Six Tastes

तत्रादौ रसद्रव्यदोषविकारप्रभावान् वक्ष्यामः।रसास्तावत् षट्-मधुराम्ललवणकटुतिक्तकषायाः। ते सम्यगुपयुज्यमानाः शरीरं यापयन्ति, मिथ्योपयुज्यमानास्तु खलु दोषप्रकोपायोपकल्पन्ते॥४॥

First, the effects of taste, substances, Doshas, and disorders will be explained. There are six tastes: sweet, sour, salty, pungent, bitter, and astringent. When used appropriately, they support the maintenance of the body; when used improperly, they can aggravate the Doshas. Ayurveda recognizes six principal tastes, each associated with particular properties and effects. Their appropriate use depends on the individual’s constitution, current Dosha status, digestive capacity, quantity consumed, and the characteristics of the substance.

The Physiological Role Of The Three Doshas

दोषाः पुनस्त्रयो वातपित्तश्लेष्माणः।ते प्रकृतिभूताः शरीरोपकारका भवन्ति, विकृतिमापन्नास्तु खलु नानाविधैर्विकारैः शरीरमुपतापयन्ति॥५॥

The three Doshas are Vata, Pitta, and Shleshma (Kapha). In their normal state, they contribute to the maintenance of the body. When disturbed, they become associated with different disorders. Vata is associated with movement and regulation, Pitta with transformation and metabolic processes, and Kapha with stability, cohesion, and support. These are broad Ayurvedic interpretations rather than exact equivalents of individual modern physiological systems. The verse provides the basis for understanding why dietary substances that influence Doshas must be selected carefully.

तत्र दोषमेकैकं त्रयस्त्रयो रसा जनयन्ति, त्रयस्त्रयश्चोपशमयन्ति| तद्यथा- कटुतिक्तकषाया वातं जनयन्ति, मधुराम्ललवणास्त्वेनं शमयन्ति; कट्वम्ललवणाः पित्तं जनयन्ति, मधुरतिक्तकषायास्त्वेनच्छ्मयन्ति; मधुराम्ललवणाः श्लेष्माणं जनयन्ति, कटुतिक्तकषायास्त्वेनं शमयन्ति||६||

Three tastes aggravate each Dosha, while three others pacify it. Katu (pungent), Tikta (bitter), and Kashaya (astringent) aggravate Vata, whereas Madhura (sweet), Amla (sour), and Lavana (salty) pacify it. Katu, Amla, and Lavana aggravate Pitta, while Madhura, Tikta, and Kashaya pacify it. Madhura, Amla, and Lavana aggravate Kapha, whereas Katu, Tikta, and Kashaya pacify it.

रसदोषसन्निपाते तु ये रसा यैर्दोषैः समानगुणाः समानगुणभूयिष्ठा वा भवन्ति
ते तानभिवर्धयन्ति, विपरीतगुणा विपरीतगुणभूयिष्ठा वा शमयन्त्यभ्यस्यमाना इति|
एतद्व्यवस्थाहेतोः षट्त्वमुपदिश्यते रसानां परस्परेणासंसृष्टानां, त्रित्वं च दोषाणाम्||७||

When tastes interact with the Doshas, those possessing similar or predominantly similar qualities increase the corresponding Doshas. Conversely, tastes with opposite or predominantly opposite qualities reduce them when used regularly. This principle explains the classification of substances into six distinct tastes and the three Doshas.

संसर्गविकल्पविस्तरो ह्येषामपरिसङ्ख्येयो भवति, विकल्पभेदापरिसङ्ख्येयत्वात्||८||

The possible combinations and variations of tastes and Doshas are innumerable because of the countless ways in which their combinations can differ.

तत्र खल्वनेकरसेषु द्रव्येष्वनेकदोषात्मकेषु च विकारेषु रसदोषप्रभावमेकैकश्येनाभिसमीक्ष्य ततो द्रव्यविकारयोः प्रभावतत्त्वं व्यवस्येत्||९||

When substances possess multiple tastes and diseases involve multiple Doshas, the effects of each taste and Dosha should be examined separately. This assessment helps determine the specific effects of the substance and the nature of the disease. This verse emphasizes systematic assessment in Ayurvedic practice. A substance may contain several tastes, each influencing the Doshas differently, while a disease may involve disturbances of more than one Dosha. Therefore, the physician should evaluate these effects individually before determining the overall action of a medicine or understanding the disease process. This approach supports accurate assessment and individualized treatment planning.

न त्वेवं खलु सर्वत्र|
न हि विकृतिविषमसमवेतानां नानात्मकानां परस्परेण चोपहतानामन्यैश्च विकल्पनैर्विकल्पितानामवयवप्रभावानुमानेनैव समुदायप्रभावतत्त्वमध्यवसातुं शक्यम्||१०||

However, this method cannot be applied in every situation. When substances with different properties are combined in varying proportions, interact with, or modify one another, the overall effect of the combination cannot always be determined merely by examining the effects of its individual components. This verse explains that the combined action of a formulation may differ from the effects of its individual ingredients. Their properties, proportions, and interactions can modify the final outcome. Therefore, the therapeutic action of a compound preparation should not be predicted solely from the known effects of its separate components. This principle highlights the importance of understanding the formulation as a whole when assessing the effects of Ayurvedic medicines.

तथायुक्ते हि समुदये समुदायप्रभावतत्त्वमेवमेवोपलभ्य ततो द्रव्यविकारप्रभावतत्त्वं व्यवस्येत्||११||

In such combinations, the overall effect should first be understood by observing the combined substance as a whole. This understanding helps determine the actual effects of the substance and its influence on the disease.

तस्माद्रसप्रभावतश्च द्रव्यप्रभावतश्च दोषप्रभावतश्च विकारप्रभावतश्च तत्त्वमुपदेक्ष्यामः||१२||

Therefore, the principles governing the effects of Rasa (taste), Dravya (substance), Dosha (functional factors of the body), and Vikara (disease or pathological condition) will now be explained.

Effect Of The Dravya

तत्रैष रसप्रभाव उपदिष्टो भवति| द्रव्यप्रभावं पुनरुपदेक्ष्यामः| तैलसर्पिर्मधूनि वातपित्तश्लेष्मप्रशमनार्थानि द्रव्याणि भवन्ति||१३||

The effects of Rasa (taste) have been explained. The effects of Dravya (substances) will now be described. Taila (oil), Sarpi (ghee), and Madhu (honey) are substances used for pacifying Vata, Pitta, and Kapha, respectively.

तत्र तैलं स्नेहौष्ण्यगौरवोपपन्नत्वाद्वातं जयति सततमभ्यस्यमानं; वातो हि रौक्ष्यशैत्यलाघवोपपन्नो विरुद्धगुणो भवति, विरुद्धगुणसन्निपाते हि भूयसाऽल्पमवजीयते, तस्मात्तैलं वातं जयति सततमभ्यस्यमानम्| सर्पिः खल्वेवमेव पित्तं जयति, माधुर्याच्छैत्यान्मन्दत्वाच्च; पित्तं ह्यमधुरमुष्णं तीक्ष्णं च| मधु च श्लेष्माणं जयति, रौक्ष्यात्तैक्ष्ण्यात् कषायत्वाच्च; श्लेष्मा हि स्निग्धो मन्दो मधुरश्च | यच्चान्यदपि किञ्चिद्द्रव्यमेवं वातपित्तकफेभ्यो गुणतो विपरीतं स्यात्तच्चैताञ्जयत्यभ्यस्यमानम्||१४||

Oil (Taila) helps pacify Vata because of its unctuous, warm, and heavy qualities, which oppose Vata’s dry, cold, and light qualities. Ghee (Sarpi) helps pacify Pitta because of its sweet, cooling, and mild properties, which oppose Pitta’s hot and sharp qualities. Honey (Madhu) helps pacify Kapha because of its dry, sharp, and astringent properties, which oppose Kapha’s unctuous, slow, and sweet qualities. Similarly, other substances possessing qualities opposite to those of Vata, Pitta, or Kapha can help reduce the respective Dosha when appropriately used over time. This verse explains the Ayurvedic principle that opposing qualities help reduce an aggravated Dosha. Oil is associated with Vata pacification because it counteracts dryness and coldness. Ghee is associated with Pitta pacification because its cooling and mild qualities oppose heat and sharpness. Honey is associated with Kapha pacification because its drying and astringent properties oppose heaviness and unctuousness. This principle guides the selection of dietary substances and medicines according to their qualities and the patient’s condition.

3 Substances That Should Not Be Used In Excess

अथ खलु त्रीणि द्रव्याणि नात्युपयुञ्जीताधिकमन्येभ्यो द्रव्येभ्यः; तद्यथा- पिप्पली, क्षारः, लवणमिति||१५||

Three substances should not be consumed or used excessively compared with other substances: Pippali (long pepper), Kshara (alkaline substances), and Lavana (salt).

Properties Of Pippali And The Effects Of Its Excessive Use

पिप्पल्यो हि कटुकाः सत्यो मधुरविपाका गुर्व्योनात्यर्थं स्निग्धोष्णाः प्रक्लेदिन्यो भेषजाभिमताश्चताः सद्यः; शुभाशुभकारिण्यो भवन्ति; आपातभद्राः, प्रयोगसमसाद्गुण्यात्; दोषसञ्चयानुबन्धाः;- सततमुपयुज्यमाना हि गुरुप्रक्लेदित्वाच्छ्लेष्माणमुत्क्लेशयन्ति, औष्ण्यात् पित्तं, न च वातप्रशमनायोपकल्पन्तेऽल्पस्नेहोष्णभावात्; योगवाहिन्यस्तु खलु भवन्ति;तस्मात् पिप्पलीर्नात्युपयुञ्जीत||१६|

Pippali (long pepper) has a pungent taste and a sweet post-digestive effect. It is heavy, moderately unctuous, warm, moisture-promoting, and valued for medicinal use. Its effects can be beneficial or harmful depending on how it is used. Although it may initially appear beneficial because of its therapeutic properties, continuous use can lead to the accumulation and aggravation of Doshas (functional principles of the body). Its heaviness and moisture-promoting qualities can aggravate Kapha (stability and structure), while its warmth can aggravate Pitta (metabolism and heat). Due to its limited unctuousness and warmth in the context described, it may not adequately pacify Vata (movement). Pippali can also enhance or carry the effects of other substances. Therefore, it should not be used excessively.

Properties Of Kshara And The Harmful Effects Of Its Excessive Use

क्षारः पुनरौष्ण्यतैक्ष्णयलाघवोपपन्नः क्लेदयत्यादौ पश्चाद्विशोषयति, स पचनदहनभेदनार्थमुपयुज्यते; सोऽतिप्रयुज्यमानः केशाक्षिहृदयपुंस्त्वोपघातकरः सम्पद्यते| ये ह्येनं ग्रामनगरनिगमजनपदाः सततमुपयुञ्जते त आन्ध्यषाण्ढ्यखालित्यपालित्यभाजो हृदयापकर्तिनश्च भवन्ति, तद्यथा- प्राच्याश्चीनाश्च; तस्मात् क्षारं नात्युपयुञ्जीत||१७||

Kshara (alkaline substances) possesses hot, sharp, and light properties. Initially, it promotes moisture, but later it causes dryness. It is used for purposes such as digestion, cauterisation, and breaking down or separating tissues. However, excessive use can harm the hair, eyes, heart, and reproductive capacity. Communities that use it continuously are described as being more prone to blindness, infertility or loss of sexual capacity, hair loss, premature greying, and cardiac harm. Therefore, Kshara should not be used excessively.

Properties Of Lavana And The Harmful Effects Of Excessive Salt Intake

लवणं पुनरौष्ण्यतैक्ष्ण्योपपन्नम्, अनतिगुरु, अनतिस्निग्धम्, उपक्लेदि, विस्रंसनसमर्थम्, अन्नद्रव्यरुचिकरम्, आपातभद्रं प्रयोगसमसाद्गुण्यात्, दोषसञ्चयानुबन्धं, तद्रोचनपाचनोपक्लेदनविस्रंसनार्थमुपयुज्यते| तदत्यर्थमुपयुज्यमानं ग्लानिशैथिल्यदौर्बल्याभिनिर्वृत्तिकरं शरीरस्य भवति| ये ह्येनद्ग्रामनगरनिगमजनपदाः सततमुपयुञ्जते, ते भूयिष्ठं ग्लास्नवः शिथिलमांसशोणिता अपरिक्लेशसहाश्च भवन्ति| तद्यथा- बाह्लीकसौराष्ट्रिकसैन्धवसौवीरकाः; ते हि पयसाऽपि सह लवणमश्नन्ति| येऽपीह भूमेरत्यूषरा देशास्तेष्वोषधिवीरुद्वनस्पतिवानस्पत्या न जायन्तेऽल्पतेजसो वा भवन्ति, लवणोपहतत्वात्| तस्माल्लवणं नात्युपयुञ्जीत| ये ह्यतिलवणसात्म्याः पुरुषास्तेषामपि खालित्यपालित्यानि वलयश्चाकाले भवन्ति||१८||

Lavana (salt) possesses hot and sharp properties. It is neither excessively heavy nor excessively unctuous, promotes moisture, supports downward movement and elimination, and enhances the taste of food. Its initial benefits arise from its appropriate use, but continued excessive intake may contribute to Dosha (functional principle) accumulation. Salt is used to improve taste, support digestion, promote moisture, and facilitate elimination.Excessive consumption can cause fatigue, looseness of body tissues, and weakness. The text describes populations accustomed to frequent salt consumption as having greater bodily fatigue, reduced firmness of muscle and blood tissue, and lower tolerance for physical exertion. It also observes that highly saline soil may prevent plants from growing properly or cause them to grow with reduced vigour. Even people accustomed to high salt intake may develop premature hair loss, greying, and wrinkles. Therefore, salt should not be consumed excessively.

तस्मात्तेषां तत्सात्म्यतः क्रमेणापगमनं श्रेयः। सात्म्यमपि हि क्रमेणोपनिवर्त्यमानमदोषमल्पदोषं वा भवति॥१९॥

Therefore, it is better to gradually withdraw from substances to which a person has become accustomed, particularly when that habit is excessive or unsuitable. Even an established dietary habit, when discontinued gradually, causes no harm or only minimal harm.

Types Of Satmya (Individual Suitability And Dietary Adaptation)

सात्म्यं नाम तद् यदात्मन्युपशेते; सात्म्यार्थो ह्युपशयार्थः| तत्त्रिविधं प्रवरावरमध्यविभागेन; सप्तविधं तु रसैकैकत्वेन सर्वरसोपयोगाच्च| तत्र सर्वरसं प्रवरम्, अवरमेकरसं, मध्यं तु प्रवरावरमध्यस्थम्| तत्रावरमध्याभ्यां सात्म्याभ्यां क्रमेणैव प्रवरमुपपादयेत् सात्म्यम्| सर्वरसमपि च सात्म्यमुपपन्नः प्रकृत्याद्युपयोक्त्रष्टमानि सर्वाण्याहारविधिविशेषायतनान्यभिसमीक्ष्य हितमेवानुरुध्येत||२०||

Satmya refers to that which is suitable for an individual and agrees with their body. It is classified into three levels: superior, inferior, and intermediate. It can also be classified into seven types according to the use of individual tastes and the use of all six tastes together.The use of all six tastes is considered superior Satmya, while the use of only one taste is considered inferior. Intermediate Satmya lies between these two. A person with inferior or intermediate dietary adaptation should gradually develop a more comprehensive and suitable dietary pattern. Even someone accustomed to all six tastes should choose foods that are beneficial after considering the eight factors governing proper food intake, beginning with individual constitution.

Ashta Ahara Vidhi Visheshayatana (Eight Factors Governing Proper Food Intake)

तत्रखल्विमान्यष्टावाहारविधिविशेषायतनानि भवन्ति; तद्यथा- प्रकृतिकरणसंयोगराशिदेशकालोपयोगसंस्थोपयोक्त्रष्टमानि (भवन्ति)||२१||

There are eight factors that determine the proper use and effects of food: Prakriti (natural properties), Karana (processing), Samyoga (combination), Rashi (quantity), Desha (place or habitat), Kala (time), Upayoga Samstha (rules of eating), and Upayokta (the person consuming the food).

Prakriti (Natural Properties Of Food And Medicines)

तत्र प्रकृतिरुच्यते स्वभावो यः, स पुनराहारौषधद्रव्याणां स्वाभाविको गुर्वादिगुणयोगः; तद्यथा माषमुद्गयोः, शूकरैणयोश्च (१)॥२२॥

• Prakriti refers to the natural characteristics of a substance. In food and medicinal substances, it denotes their inherent qualities, such as heaviness and lightness. For example, Masha (black gram) and Mudga (green gram) differ in their natural properties, just as pork and the meat of deer differ from each other.
• This verse explains that every food and medicinal substance possesses inherent qualities that influence its effects on the body. These qualities exist naturally, independent of how the substance is prepared. For example, black gram is generally considered heavier to digest than green gram, while pork and deer meat differ in their qualities and effects. Understanding Prakriti (natural properties) helps in selecting suitable foods and medicines according to an individual’s digestive capacity and health needs.

Karana (Processing And Modification Of Food Properties)

करणं पुनः स्वाभाविकानां द्रव्याणामभिसंस्कारः। संस्कारो हि गुणान्तराधानमुच्यते। ते गुणास्तोयाग्निसन्निकर्षशौचमन्थनदेशकालवासनभावनादिभिः कालप्रकर्षभाजनादिभिश्चाधीयन्ते (२)॥२२॥

Karana refers to the processing of substances that possess natural properties. This processing, known as Samskara (transformation through processing), introduces or modifies qualities. These qualities are imparted through methods such as contact with water and fire, cleaning, churning, place and time of processing, flavouring, soaking or impregnation with substances, prolonged processing, and the use of particular vessels. This verse explains that the properties of food and medicinal substances can change through preparation and processing. Although a substance has inherent qualities, methods such as washing, heating, churning, soaking, flavouring, and storing it for a particular duration can modify its characteristics and effects. For example, boiling a food may alter its texture and digestibility, while roasting can change its moisture content and flavour. Thus, Karana (processing) is an important factor in determining the final properties and suitability of food or medicine.

Samyoga (Combination Of Substances)

संयोगः पुनर्द्वयोर्बहूनां वा द्रव्याणां संहतीभावः, स विशेषमारभते, यं पुनर्नैकैकशो द्रव्याण्यारभन्ते; तद्यथा- मधुसर्पिषोः, मधुमत्स्यपयसां च संयोगः (३)॥२२॥

Samyoga refers to the combination of two or more substances. Such a combination can produce a distinct effect that the individual substances do not produce independently. Examples include the combination of Madhu (honey) and Sarpi (ghee), and the combination of honey, fish, and milk.

Rashi (Quantity Of Food)

राशिस्तु सर्वग्रहपरिग्रहौ मात्रामात्रफलविनिश्चयार्थः। तत्र सर्वस्याहारस्य प्रमाणग्रहणमेकपिण्डेन सर्वग्रहः, परिग्रहः पुनः प्रमाणग्रहणमेकैकश्येनाहारद्रव्याणाम्। सर्वस्य हि ग्रहः सर्वग्रहः, सर्वतश्च ग्रहः परिग्रह उच्यते (४)॥२२॥

Rashi refers to the quantity of food and is used to determine the effects of consuming an appropriate or inappropriate amount. It is assessed in two ways: Sarvagraha, which considers the total quantity of the entire meal as a whole, and Parigraha, which considers the quantity of each individual food item separately. Thus, Sarvagraha means assessing the whole intake, while Parigraha means assessing the individual components of the meal. This verse emphasizes that the quantity of food should be evaluated both collectively and individually. Sarvagraha (total quantity) involves assessing the overall amount consumed in one meal, whereas Parigraha (individual quantity) involves examining the amount of each food item. Both assessments help determine whether the meal is appropriate for the individual. Even wholesome foods can cause discomfort or impair digestion when consumed in excessive quantities; therefore, meal size and the proportions of individual foods should be considered together.

Desha (Place And Geographical Suitability)

देशः पुनः स्थानं; स द्रव्याणामुत्पत्तिप्रचारौ देशसात्म्यं चाचष्टे (५)॥२२॥

Desha refers to place or geographical location. It indicates the place where substances originate and are found, as well as their suitability for the people living in that region. This verse explains that geographical location influences the properties and availability of food and medicinal substances. Desha also helps assess Desha Satmya (regional suitability), meaning how well a substance or dietary practice suits the environment and the people living there. Climate, soil, water, and local conditions influence the qualities of plants and other food sources. Therefore, regional factors should be considered when selecting appropriate foods and medicines for an individual.

Kala (Time And Seasonal Considerations)

कालो हि नित्यगश्चावस्थिकश्च; तत्रावस्थिको विकारमपेक्षते, नित्यगस्तु ऋतुसात्म्यापेक्षः (६) |२२|

Kala refers to time and is of two types: Nityaga (the regular passage of time) and Avasthika (time in relation to a particular condition or stage). Avasthika Kala depends on the presence and progression of a disease or condition, whereas Nityaga Kala is considered in relation to seasonal suitability.  This verse explains that time influences dietary and therapeutic decisions in two ways. Nityaga Kala (regular or cyclical time) includes recurring changes such as seasons, which affect food choices and the body’s adaptation to the environment. Avasthika Kala (condition-dependent time) relates to the stage or progression of a disease and the individual’s current state. For example, dietary requirements can vary between seasons, while treatment choices can differ depending on whether a disease is in an early, progressing, or recovering stage. Thus, both seasonal timing and the person’s condition are important when selecting food and treatment.

Upayoga Samstha (Rules For Food Intake)

उपयोगसंस्था तूपयोगनियमः; स जीर्णलक्षणापेक्षः (७)॥२२॥

• Upayoga Samstha refers to the rules governing food intake. These rules depend on the signs that indicate the proper digestion of previously consumed food.
• This verse emphasizes that food should be consumed according to appropriate dietary practices, particularly with attention to the digestion of the previous meal. The signs of proper digestion help determine when it is suitable to eat again. This principle discourages eating without considering digestive readiness and highlights the importance of regular, mindful eating habits. In Ayurveda, such practices are intended to support digestion and reduce digestive discomfort.

Upayokta (The Individual Consuming Food)

उपयोक्ता पुनर्यस्तमाहारमुपयुङ्क्ते, यदायत्तमोकसात्म्यम्। इत्यष्टावाहारविधिविशेषायतनानि व्याख्यातानि भवन्ति॥२२॥

Upayokta refers to the person who consumes the food. Oka Satmya (habitual suitability) depends on this individual, as it develops through regular use of particular foods and dietary practices. Thus, the eight factors governing proper food intake have been explained. This verse completes the explanation of the eight Ahara Vidhi Visheshayatana (factors governing proper food intake) by emphasizing the role of the individual consuming the food. People differ in their constitution, digestive capacity, dietary habits, and tolerance to particular foods. Oka Satmya refers to suitability developed through habitual consumption. However, familiarity alone does not make every food wholesome; the individual’s established habits must still be assessed for their health effects. The verse reinforces the principle that dietary choices should be individualized and guided by what is beneficial.

Importance Of Understanding Dietary Factors And Choosing Wholesome Food

एषां विशेषाः शुभाशुभफलाः परस्परोपकारका भवन्ति; तान् बुभुत्सेत, बुद्ध्वा च हितेप्सुरेव स्यात्; नच मोहात् प्रमादाद्वा प्रियमहितमसुखोदर्कमुपसेव्यमाहारजातमन्यद्वा किञ्चित्॥२३॥

The specific characteristics of these factors produce beneficial or harmful effects and can influence one another. A person should seek to understand them and, after gaining this knowledge, choose what is beneficial. One should not consume food or use other substances that are pleasant but harmful and lead to undesirable consequences, whether through ignorance or carelessness. This verse concludes the discussion of the eight Ahara Vidhi Visheshayatana (factors governing proper food intake). It emphasizes that the effects of food depend on several interacting factors, including its natural properties, processing, combination, quantity, place, time, rules of consumption, and the individual consuming it. A food that tastes pleasant or provides immediate satisfaction is not necessarily beneficial in the long term. Ayurveda therefore encourages informed dietary choices based on health needs and suitability rather than habit, carelessness, or temporary pleasure.

Ahara Vidhi (Guidelines For Proper Eating)

तत्रेदमाहारविधिविधानमरोगाणामातुराणां चापि केषाञ्चित् काले प्रकृत्यैव हिततमं भुञ्जानानां भवति- उष्णं, स्निग्धं, मात्रावत्, जीर्णे वीर्याविरुद्धम्, इष्टे देशे, इष्टसर्वोपकरणं, नातिद्रुतं, नातिविलम्बितम्, अजल्पन्, अहसन्, तन्मना भुञ्जीत, आत्मानमभिसमीक्ष्य सम्यक्॥२४॥

The following guidelines describe an appropriate way of eating for healthy individuals and for certain patients when suitable to their condition. Food should be warm, unctuous, taken in the proper quantity, and consumed after the previous meal has been digested. The food should not have properties incompatible with the individual’s constitution or digestive state. It should be eaten in a suitable place with the necessary facilities and without rushing or excessive delay. A person should eat without talking or laughing, with attention focused on the meal, and after assessing their own needs and condition. This verse presents practical principles for healthy eating. Warm food is generally considered supportive of digestion, while suitable unctuousness can aid palatability and lubrication. Appropriate quantity and waiting until the previous meal has been digested help avoid excessive digestive burden. Food should also suit the individual’s needs and be consumed in a comfortable environment.The instructions to avoid eating too quickly or too slowly, talking excessively, or laughing while eating emphasize mindful and attentive consumption. Overall, the verse teaches that health depends not only on what a person eats, but also on the quantity, timing, setting, and manner of eating. These guidelines should be adapted to the individual’s medical condition and dietary requirements.

Benefits of Eating Warm Food (Ushna Ahara)

तस्य साद्गुण्यमुपदेक्ष्यामः- उष्णमश्नीयात्; उष्णं हि भुज्यमानं स्वदते, भुक्तं चाग्निमौदर्यमुदीरयति, क्षिप्रं जरां गच्छति, वातमनुलोमयति, श्लेष्माणं च परिह्रासयति; तस्मादुष्णमश्नीयात् (१)॥२५॥

The benefits of proper eating are explained as follows: one should eat warm food. Warm food is more palatable, stimulates Agni (digestive capacity) after consumption, undergoes digestion quickly, promotes the normal downward movement of Vata (movement), and reduces Kapha (stability and structure). Therefore, food should be eaten warm.

Benefits Of Eating Unctuous Food (Snigdha Ahara)

स्निग्धमश्नीयात्; स्निग्धं हि भुज्यमानं स्वदते, भुक्तं चानुदीर्णमग्निमुदीरयति, क्षिप्रं जरां गच्छति, वातमनुलोमयति, शरीरमुपचिनोति, दृढीकरोतीन्द्रियाणि, बलाभिवृद्धिमुपजनयति, वर्णप्रसादं चाभिनिर्वर्तयति; तस्मात् स्निग्धमश्नीयात् (२)॥२५॥

One should eat unctuous food. Such food is palatable and, when consumed, stimulates digestive activity without aggravating it excessively. It is digested quickly, promotes the normal movement of Vata (movement), nourishes the body, strengthens the sensory organs, improves strength, and enhances complexion and clarity of appearance. Therefore, one should consume appropriately unctuous food.

Importance Of Eating The Proper Quantity Of Food (Matra Ahara)

मात्रावदश्नीयात्; मात्रावद्धि भुक्तं वातपित्तकफानपीडयदायुरेव विवर्धयति केवलं, सुखं गुदमनुपर्येति, न चोष्माणमुपहन्ति, अव्यथं च परिपाकमेति; तस्मान्मात्रावदश्नीयात् (३)॥२५॥

One should eat food in the proper quantity. Food consumed in an appropriate amount does not disturb Vata (movement), Pitta (metabolism), or Kapha (stability and structure). It supports longevity, passes comfortably through the digestive tract, does not impair the digestive fire, and undergoes digestion without causing discomfort. Therefore, one should eat the appropriate quantity of food. The suitable quantity varies according to the food’s heaviness or lightness, digestive capacity, age, activity level, and health status. The key principle is to eat enough to meet the body’s needs without overburdening digestion.

Eating After Complete Digestion of the Previous Meal (Jirne Ashniyat)

जीर्णेऽश्नीयात्; अजीर्णे हि भुञ्जानस्याभ्यवहृतमाहारजातं पूर्वस्याहारस्य रसमपरिणतमुत्तरेणाहाररसेनोपसृजत् सर्वान् दोषान् प्रकोपयत्याशु, जीर्णे तु भुञ्जानस्य स्वस्थानस्थेषु दोषेष्वग्नौ चोदीर्णे जातायां च बुभुक्षायां विवृतेषु च स्रोतसां मुखेषु विशुद्धे चोद्गारे हृदये विशुद्धे वातानुलोम्ये विसृष्टेषु च वातमूत्रपुरीषवेगेष्वभ्यवहृतमाहारजातं सर्वशरीरधातूनप्रदूषयदायुरेवाभिवर्धयति केवलं; तस्माज्जीर्णेऽश्नीयात् (४)॥२५॥

One should eat only after the previous meal has been digested. If food is consumed before digestion is complete, the newly consumed food mixes with the incompletely processed material from the previous meal and quickly aggravates the Doshas (functional principles of the body).When the previous meal has been digested, the Doshas remain in their normal locations, digestive activity is stimulated, hunger arises, the channels of the body are clear, belching is unobstructed, the chest and heart region feel clear, Vata moves normally, and the urges to pass flatus, urine, and stool have been relieved. Food consumed at this stage does not adversely affect the body tissues and supports longevity. Therefore, one should eat after the previous meal has been digested. This verse emphasizes the importance of allowing adequate time for digestion before eating another meal. Ayurveda describes several signs of digestive readiness, including natural hunger, clear belching, comfortable movement of Vata, and the absence of unresolved digestive discomfort. Eating again before the previous meal has been digested is described as disturbing the Doshas and impairing normal digestive function. The practical principle is to avoid eating solely out of habit or at a fixed time when one is still uncomfortably full. Meal timing should account for hunger, digestive comfort, and individual needs. However, persistent loss of appetite, prolonged fullness, or recurrent digestive symptoms should be medically assessed rather than attributed only to incomplete digestion.

Eating Food With Compatible Potencies (Virya Aviruddha Ahara)

वीर्याविरुद्धमश्नीयात्; अविरुद्धवीर्यमश्नन् हि विरुद्धवीर्याहारजैर्विकारैर्नोपसृज्यते; तस्माद्वीर्याविरुद्धमश्नीयात् (५)॥२५॥

One should eat food whose potencies are compatible. A person who consumes food with compatible Virya (potency or active effect) does not develop disorders attributed to consuming foods with mutually incompatible potencies. Therefore, one should choose food combinations with compatible properties.

Eating In A Suitable Place With Proper Facilities (Ishta Desha And Upakarana)

इष्टे देशे इष्टसर्वोपकरणं चाश्नीयात्; इष्टे हि देशे भुञ्जानो नानिष्टदेशजैर्मनोविघातकरैर्भावैर्मनोविघातं प्राप्नोति, तथैवेष्टैः सर्वोपकरणैः; तस्मादिष्टे देशे तथेष्टसर्वोपकरणं चाश्नीयात् (६)॥२५॥

One should eat in a suitable and agreeable place, with all the necessary facilities and utensils. Eating in a pleasant environment helps prevent mental disturbance caused by undesirable surroundings. Similarly, appropriate and convenient eating arrangements help make the meal more comfortable. Therefore, food should be consumed in a suitable place with proper facilities.

Avoid Eating Too Quickly (Na Atidrutam Ashniyat)

नातिद्रुतमश्नीयात्; अतिद्रुतं हि भुञ्जानस्योत्स्नेहनमवसादनं भोजनस्याप्रतिष्ठानं च, भोज्यदोषसाद्गण्योपलब्धिश्च न नियता; तस्मान्नातिद्रुतमश्नीयात् (७)॥२५॥

One should not eat too quickly. When a person eats excessively fast, the food may not be adequately moistened and mixed with saliva, and it may pass through the mouth without sufficient attention or proper handling. As a result, the person may not reliably identify the qualities or defects of the food. Therefore, one should avoid eating too quickly.

Avoid Eating Too Slowly (Na Ativilambitam Ashniyat)

नातिविलम्बितमश्नीयात्; अतिविलम्बितं हि भुञ्जानो न तृप्तिमधिगच्छति, बहु भुङ्क्ते, शीतीभवत्याहारजातं, विषमं च पच्यते; तस्मान्नातिविलम्बितमश्नीयात् (८)॥२५॥

One should not eat excessively slowly. A person who takes too long to eat may fail to achieve proper satisfaction, consume more food than necessary, allow the meal to become cold, and experience irregular digestion. Therefore, one should avoid eating too slowly.

Eating Mindfully Without Talking Or Laughing (Tanmana Ahara)

अजल्पन्नहसन् तन्मना भुञ्जीत; जल्पतो हसतोऽन्यमनसो वा भुञ्जानस्य त एव हि दोषा भवन्ति, य एवातिद्रुतमश्नतः; तस्मादजल्पन्नहसंस्तन्मना भुञ्जीत (९)॥२५॥

One should eat without talking or laughing and keep the mind focused on the meal. A person who talks, laughs, or remains distracted while eating may experience the same disadvantages as someone who eats too quickly. Therefore, one should eat attentively, without excessive conversation or laughter.

Eating According To Individual Suitability (Atma Satmya)

आत्मानमभिसमीक्ष्य भुञ्जीत सम्यक्; इदं ममोपशेते इदं नोपशेत इत्येवं विदितं ह्यस्यात्मन आत्मसात्म्यं भवति; तस्मादात्मानमभिसमीक्ष्य भुञ्जीत सम्यगिति॥२५॥

One should eat appropriately after carefully considering one’s own needs and suitability. A person should understand which foods agree with their body and which do not. This knowledge of what is suitable for oneself is known as Atma Satmya (individual suitability). Therefore, one should eat thoughtfully, taking personal suitability into account.

Qualities Of A Knowledgeable Physician (Bhishak)

भवति चात्र-
रसान् द्रव्याणि दोषांश्च विकारांश्च प्रभावतः। वेद यो देशकालौ च शरीरं च स नो भिषक्॥२६॥

A person who understands Rasa (taste), Dravya (substances), Dosha (functional principles), Vikara (diseases), their respective effects, Desha (place), Kala (time), and Sharira (the body) is truly a physician. This verse summarizes the knowledge required for competent medical practice. A physician should understand the properties and effects of substances, the roles of the Doshas, the nature of diseases, and the influence of geographical location and time. Knowledge of Sharira (the body) is equally important for understanding individual differences and selecting appropriate treatment.

Summary Of Rasavimanam

तत्र श्लोकौ-
विमानार्थो रसद्रव्यदोषरोगाः प्रभावतः। द्रव्याणि नातिसेव्यानी त्रिविधं सात्म्यमेव च॥२७॥
आहारायतनान्यष्टौ भोज्यसाद्गुण्यमेव च। विमाने रससङ्ख्याते सर्वमेतत् प्रकाशितम्॥२८॥

These concluding verses summarize the subjects explained in Rasavimanam. They include the meaning and purpose of Vimanasthana, the effects of Rasa (taste), Dravya (substances), Dosha (functional principles), and Roga (disease); substances that should not be used excessively; and the three types of Satmya (individual suitability).They also summarize the eight factors governing food intake and the qualities of proper eating. All these topics have been explained in the chapter known as Rasavimanam.

इत्यग्निवेशकृते तन्त्रे चरकप्रतिसंस्कृते विमानस्थाने रसविमानं नाम प्रथमोऽध्यायः||१||

Thus ends the first chapter of Vimanasthana, known as Rasavimanam, in the treatise composed by Agnivesha and redacted by Charaka.

Summary

Rasavimanam, the first chapter of Vimanasthana in the Charaka Samhita, explains the role of Rasa (taste), Dravya (substance), and Dosha (functional principles) in maintaining health and understanding disease. It describes the six tastes and their effects on Vata, Pitta, and Kapha, emphasizing that appropriate use supports health, whereas excessive or improper use can disturb their normal functions. The chapter also cautions against excessive use of Pippali (long pepper), Kshara (alkaline substances), and Lavana (salt), and explains Satmya (individual suitability) and the importance of gradually changing unsuitable dietary habits. A major focus is placed on the eight factors governing food intake, including its natural properties, processing, combination, quantity, place, time, rules of eating, and the individual consuming it. The chapter concludes with practical guidelines for proper eating and highlights that a physician must understand the properties of substances, the patient’s condition, and individual needs to make appropriate therapeutic decisions.