Natural Compound

Holy Basil

Ocimum tenuiflorum

Evidence TierBWADA NOT PROHIBITED

tuneTypical Dose

300-600 mg per day (standardized extract)

watchEffect Window

2-4 weeks for initial stress/anxiety effects. 60-day protocol for full evaluation.

check_circleCompliance

WADA NOT PROHIBITED

Overview

Clinical Summary

Holy basil has small but credible human data for stress-symptom reduction, with effects that appear modest, extract-specific, and still concentrated in a limited number of trials.

Holy basil is one of the more plausible stress-support botanicals, but the evidence base is still small and geographically concentrated. The best trials report improvement in general stress and anxiety-style symptom scales over 6 to 8 weeks, with only thin evidence for secondary glucose effects. Benefits depend on standardized extracts and should be framed as modest symptom support rather than broad adaptogenic certainty.

Anxiolytic adaptogen profile with HPA-axis modulation and COX-2 pathway support. Eugenol and rosmarinic acid contribute antioxidant activity.

Outcomes

What This Is Expected To Influence

Primary Outcomes

  • Reduction in stress and anxiety symptoms, including GAD-oriented outcomes

Secondary Outcomes

  • Modest fasting blood glucose reduction
  • Immune support signals (preclinical)

Safety

Contraindications and Interactions

Contraindications

  • Pregnancy (may stimulate uterine contractions)
  • Attempting conception (anti-fertility signal)
  • Untreated hypothyroidism

Side effects

  • GI upset
  • Nausea

Interactions

  • Anticoagulants (additive bleeding risk)
  • Diabetes medications (additive hypoglycemia)
  • Thyroid medications (may affect thyroid function)

Avoid if

  • Pregnant or attempting conception
  • Untreated hypothyroidism
  • Active bleeding disorders

Evidence

Study-level References

holy-basil-SRC-001Controlled clinical trial
Sourceopen_in_new

Bhattacharyya D, Sur TK, Jana U, Debnath PK. Controlled programmed trial of Ocimum sanctum leaf on generalized anxiety disorders. Nepal Med Coll J. 2008;10(3):176-179. PMID:19253862.

Population: Adults with generalized anxiety symptoms treated in a hospital-based clinical setting.

Dose protocol: 500 mg BID

Key findings: Significant reduction in GAD symptoms and perceived stress compared to placebo.

Notes: Single-center Indian study. Moderate methodological quality.

Paper content

This small 60-day clinical trial treated 35 adults with generalized anxiety symptoms using 500 mg of holy basil twice daily. Anxiety, stress, and depression scores improved significantly from baseline, and attention and adjustment also improved. The trial supports a real anxiolytic signal, but it appears to have been an uncontrolled or weakly controlled single-center study, so the effect size is harder to interpret than in modern placebo-controlled trials.

holy-basil-SRC-002Randomized, double-blind, placebo-controlled trial
Sourceopen_in_new

Saxena RC, Singh R, Kumar P, et al. Efficacy of an Extract of Ocimum tenuiflorum (OciBest) in the Management of General Stress. A Double-Blind, Placebo-Controlled Study. Evid Based Complement Alternat Med. 2012;2012:894509. doi:10.1155/2012/894509. PMID:21977056.

Population: Adults with stress-related symptoms.

Dose protocol: 1,200 mg/day OciBest extract

Key findings: Reduced stress scores across multiple domains including sleep, sexual function, and exhaustion.

Notes: Indian trial. Supports adaptogenic positioning but limited Western replication.

Paper content

This placebo-controlled 6-week trial tested 1,200 mg/day of a standardized holy basil extract in 150 adults with general stress symptoms. Compared with placebo, the holy basil group reported significantly greater improvement in total symptom burden, including forgetfulness, sleep problems, exhaustion, and sexual problems of recent origin. No adverse events were reported. The result supports a modest stress-symptom benefit, but the evidence remains product-specific and relies on subjective outcome scales.

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