Naga Bhasma – Benefits, Usage, Indications and Dosage Reference – Rasatantra Sar (first part); edition 13; 130 – 137. Introduction Naga bhsama is an ayurvedic formulation which is prepared from lead. This consists of nano particle sized lead particles. Its size is up to 60 nm. This is very useful in the treatment of problems related to urinary, skin, respiratory system and liver. Ingredients Purified lead Purified manashila Lemon juice Purified Sulphur Method of preparation Take up to 960 gram