Last verified: April 2026
Bilva
Bilva is simultaneously one of the most sacred trees in the Indian tradition and one of the most precisely documented medicinal herbs in classical Ayurveda. Charaka Samhita places Bilva as the first herb in the Deepaniya (digestive-stimulating) group and documents it as the primary herb for Grahani (malabsorption) and Atisara (diarrhoea). The different stages of the fruit have documented opposite effects -- a classical pharmacological precision that modern pharmacology has confirmed.
Three-stage fruit documentation -- a classical pharmacological precision
Charaka Samhita documents Bilva fruit differently at three stages of ripeness -- a level of pharmacological specificity unique among classical herb documentation:
Unripe fruit (Amra Bilva): Grahi (absorbent/astringent), Deepaniya -- the primary medicinal form for diarrhoea (Atisara) and Grahani (malabsorption). The unripe fruit reduces excess intestinal secretion and binds loose stools while stimulating Agni. Tannins and marmelosin are the primary active compounds at this stage.
Half-ripe fruit: Used in compound preparations for digestive stimulation without strong astringency.
Ripe fruit (Pakva Bilva): Madhura Rasa dominant, Mridu (soft), mildly laxative -- documented for constipation (Vibandha). The same tree's fruit, at different ripeness stages, addresses both diarrhoea (unripe) and constipation (ripe) -- one of the most striking examples of classical pharmacological precision.