What it is
Holy basil, or tulsi, refers mainly to Ocimum tenuiflorum; leaf extracts and whole-herb powders vary in volatile and polyphenol content.
Core function and why it is studied
Its composition or physiological role makes mood and stress response, glucose metabolism logical research areas. Human studies therefore examine stress-response, glucose, and lipid-related measures. That connection explains why it is studied; it does not by itself establish a meaningful benefit.
What the evidence means
Human evidence remains limited by small samples, short studies, heterogeneous preparations, or reliance on surrogate outcomes.
How to compare products
Compare botanical species, plant part, extraction method, standardization, amount per serving, excipients, contaminant testing, and batch identity.
