Holy Basil Dosage for Anxiety

Holy basil, also called tulsi (Ocimum sanctum or Ocimum tenuiflorum), is an aromatic herb used in Ayurveda as an adaptogen, a plant used to help the body cope with stress. When people search for a holy basil dosage for anxiety, they usually want a specific number, so here is the honest version: the human studies used roughly 300 to 1,200 mg of leaf extract per day, and there is no officially established anxiety dose. Those figures come from a small set of trials, which is worth keeping in mind before you treat any of them as a fixed prescription.

Because holy basil sits in the same adaptogen category as the better-studied ashwagandha, and because its own anxiety evidence is thin, our ashwagandha hub is a useful companion read if your real goal is daily stress support. This post focuses on what the holy basil dosing research actually shows.

What the trials dosed

Two small controlled studies are the usual reference points. A 2008 trial in the Nepal Medical College Journal gave people with generalized anxiety disorder 500 mg of holy basil extract twice daily (1,000 mg total) for 60 days and reported lower anxiety and stress scores (Bhattacharyya et al., 2008). A 2012 double-blind, placebo-controlled study of a standardized extract (OciBest) used 1,200 mg per day over 60 days in adults with generalized anxiety and found improvements in anxiety and related symptoms (Saxena et al., 2012).

A broader 2017 systematic review in Evidence-Based Complementary and Alternative Medicine pooled 24 human studies of tulsi across stress, metabolic, and immune endpoints, concluding the herb showed favourable effects with good tolerability but calling for larger, better-designed trials (Jamshidi & Cohen, 2017).

How the doses break down

Study	Daily dose	Duration	Population
Bhattacharyya 2008	500 mg × 2	60 days	Generalized anxiety
Saxena 2012 (OciBest)	1,200 mg	60 days	Generalized anxiety
Review range	300–1,200 mg	6–13 weeks	Mixed stress/anxiety

The practical read is that studied doses cluster between 500 and 1,200 mg of extract per day, usually split into a morning and evening dose. Extract concentration and standardization vary between products, so a milligram figure on one label is not directly comparable to another unless both state the same standardized marker.

Typical use and timing

Holy basil is taken daily rather than as needed. In the trials, benefits emerged over weeks, which fits its adaptogen profile: it supports the body’s stress response gradually rather than producing an immediate calming effect. Splitting the dose morning and evening mirrors how the studies were run. Because standardization differs, starting at the lower end of the researched range and giving it several weeks is reasonable. Holy basil supports a healthy stress response; it does not treat an anxiety disorder, and persistent anxiety deserves a clinician’s input rather than a supplement alone.

What to look for in an ashwagandha supplement

If you want the best-evidenced daily adaptogen for anxiety, ashwagandha is the more reliable choice, and a few criteria separate a worthwhile product from filler. Prefer a standardized root extract with a named form (KSM-66 or Sensoril are the ones used in trials) rather than a raw powder of unknown strength. Check the withanolide percentage, the active-compound marker, stated on the label. Look for a daily dose of 300 to 600 mg, the range studied for stress and cortisol. Confirm third-party testing for identity and contaminants. Our ashwagandha hub details the criteria and dosing, and the anxiety guide frames where an adaptogen fits alongside other support. Avoid proprietary blends that hide the extract dose, and never buy on marketing claims alone.

Cautions and interactions

Holy basil is generally well tolerated at studied doses, but the safety data thin out at higher amounts. It can lower blood sugar, so people on diabetes medication should monitor for hypoglycemia. Preclinical work suggests mild antiplatelet activity, meaning caution with blood thinners and before surgery, a point echoed by Memorial Sloan Kettering’s herb reference. It is not recommended in pregnancy due to limited safety data. If you take prescription medication or have a diagnosed anxiety condition, talk to your prescriber before starting, and reach out through our get-help resources if anxiety is interfering with daily life.

This article is for general education and is not medical advice. See our full disclaimer and get-help resources. Supplements support a healthy stress response; they do not treat anxiety disorders.