Pharmacological Study
Some of the main chemical constituents of tulsi are: oleanolic acid, ursolic acid, rosmarinic acid, eugenol, carvacrol, linalool, β-caryophyllene (about 8%), β-elemene (c.11.0%), and germacrene D (about 2%).
A variety of in vitro studies and animal studies have indicated some potential pharmacological properties of Ocimum tenuiflorum or its extracts. Recent studies suggest tulasi may be a COX-2 inhibitor, like many modern painkillers, due to its high concentration of eugenol. One small study showed it to reduce blood glucose levels in type 2 diabetics when combined with hypoglycemic drugs. The same study showed significant reduction in total cholesterol levels with tulsi. Another study showed its beneficial effect on blood glucose levels is due to its antioxidant properties. Tulasi also shows some promise for protection from radiation poisoning and cataracts. It has anti-oxidant properties and can repair cells damaged by exposure to radiation. The fixed oil has demonstrated antihyperlipidemic and cardioprotective effects in rats fed a high fat diet. Experimental studies have shown an alcoholic extract of tulsi modulates immunity, thus promoting immune system function.
β-Elemene has been studied for its potential anticancer properties, but human clinical trials have yet to confirm its effectiveness.
Isolated O. sanctum extracts have some antibacterial activity against E. coli, S. aureus and P. aeruginosa.
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