Ocimum tenuiflorum · herb
Evidence tier: limited
Adaptogenic stress support with anti inflammatory and mood balancing properties
Eugenol and ursolic acid inhibit COX 2 and NF kB signalling in the laboratory, reducing inflammatory cytokine output, and the adaptogenic account attributes the stress effects to modulation of the cortisol response. This is plausible laboratory pharmacology. It has not been shown to be the operating mechanism in people at supplemental doses, and given that the clinical outcomes themselves are unreplicated, the mechanism should be offered as a hypothesis and never as an explanation of a proven effect.
Limited. The whole clinical literature on holy basil sits in one systematic review, Jamshidi and Cohen (2017, Evidence Based Complementary and Alternative Medicine, PMC5376420), which found 24 human studies reporting effects across metabolic, cardiovascular, immune and neurocognitive outcomes and reported that all of them were positive in direction with no adverse events. That sounds better than it is, and the review says so itself: the studies suffer from the standard failings of the herbal trial literature, small sample sizes, variable and unstandardised extracts, and short durations, and the findings require replication in larger populations before definitive conclusions can be drawn. A body of small, short, mostly single centre Indian trials in which essentially every result is positive and none is negative is a literature with a publication bias shape, not a demonstrated effect, and no large independent replication exists. There is no Cochrane review. There is no EMA HMPC monograph. NCCIH has no substantive efficacy page. That absence is the finding. Holy basil should be described as a traditional Ayurvedic adaptogen with a promising but immature clinical literature, and nothing stronger. The safety point that does hold, and that consumers are unlikely to expect, is reproductive: traditional and animal evidence documents antifertility activity, with reduced sperm count and antiimplantation effects at high doses in animals, which is why it is avoided in pregnancy and by anyone trying to conceive.
300 to 600 mg of standardised extract daily, commonly quoted at 2 to 3 percent ursolic acid, or 1 to 2 g of dried leaf as a tea two to three times daily. These figures come from product practice and the small trial literature rather than from any regulator, and the extracts are not standardised to a common specification, so doses are not comparable between products.
Morning and/or evening. Works well as a tea or capsule.
Avoid in pregnancy, traditional use as an anti fertility herb; animal studies show reduced sperm count and anti implantation activity at high doses. Well tolerated at culinary doses.
Pregnancy: avoid
Breastfeeding: caution
Active compounds: eugenol, ursolic acid, rosmarinic acid, oleanolic acid
Remedies using Holy Basil · Browse by body system · Check it against what you take
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.