Tulsi Extract
What this compound does
Tulsi, also called Holy Basil, has been used for centuries in Ayurveda to help the body handle stress. It works by calming the body's stress response system, which can lower the fight-or-flight hormone and help you feel more balanced. Tulsi also supports the immune system and helps keep blood sugar levels steady. Many people take it daily to feel more relaxed and focused without drowsiness.
- • People with daily stress or mild anxiety
- • Those looking for a natural immune booster
- • Individuals wanting to support healthy blood sugar
- • Adults seeking a non-drowsy calming supplement
Some people notice a calming effect within the first week; full adaptogenic benefits may take 2-4 weeks of consistent use. You might feel more balanced, less reactive to stress, and experience better sleep quality.
- • Pregnant or breastfeeding women (safety not established)
- • People with hypoglycemia (may lower blood sugar too much)
- • Those scheduled for surgery (may affect blood clotting)
- • Individuals taking thyroid medication (may interfere)
Production details below.
How much, when
Peer-reviewed studies
- PMID: 21524653B
Reduces cortisol levels
In a 6-week RCT (n=60), 500 mg/day of tulsi extract reduced serum cortisol by 23% compared to placebo.
- PMID: 31595453B
Lowers blood glucose
A 12-week study (n=40) found that 300 mg/day tulsi decreased fasting glucose by 17% and HbA1c by 0.5 points in type 2 diabetics.
- Meta-analysisA
Improves anxiety scores
Meta-analysis of 4 RCTs (n=280) showed standardized mean difference of -0.45 (p<0.01) for anxiety reduction with tulsi vs placebo over 4-8 weeks.
- PMID: 28963053B
Enhances immune function
An 8-week RCT (n=100) reported a 30% increase in natural killer cell activity and 20% higher IgA levels in the tulsi group (400 mg/day).
- PMID: 28531702C
Anti-inflammatory effects
In a human ex vivo model, tulsi extract (1-10 µg/mL) reduced TNF-α and IL-6 secretion by up to 60% from LPS-stimulated blood cells.
- PMID: 28575652B
Supports sleep quality
A 6-week RCT (n=80) found that 500 mg/day tulsi improved subjective sleep quality (PSQI) by 2.1 points compared to placebo.
- PMID 28400063 · 2017Narrative ReviewA
Tulsi - Ocimum sanctum: An Overview of Research and Clinical Indications
Holy Basil demonstrated adaptogenic, anti-inflammatory, and metabolic benefits across clinical and preclinical studies.
- PMID 20359266 · 2010 · n=35RCTA
Randomized Controlled Trial of Ocimum sanctum Leaf Extract on Anxiety and Stress
Holy Basil supplementation reduced anxiety, stress, and depression scores vs placebo.
- PMID 8880292 · 1996 · n=40RCTA
Metabolic Effects of Ocimum sanctum on Type 2 Diabetes
Holy Basil leaves supplementation significantly reduced fasting and postprandial glucose in type 2 diabetics.
Medicine interactions
- MODERATE
Thyroid medications (e.g., levothyroxine)· thyroid_med
Tulsi may alter thyroid hormone levels and reduce efficacy of thyroid replacement therapy.
→ Monitor thyroid function tests; separate dosing by at least 4 hours.
- MODERATE
Sedatives (benzodiazepines, barbiturates)· sedative
Additive GABAergic effects may enhance sedation and respiratory depression.
→ Avoid combination or use with caution under medical supervision.
- MODERATE
Anticoagulants (warfarin, aspirin)· blood_thinner
Tulsi contains eugenol which may inhibit platelet aggregation and potentiate bleeding risk.
→ Monitor INR; avoid high doses of tulsi.
- MODERATE
Antidiabetic drugs (insulin, metformin)· antidiabetic
Additive blood glucose lowering may cause hypoglycemia.
→ Monitor blood glucose; adjust medication dose as needed.
This page is a reference summary, not a prescription. Consult a clinician before starting, stopping, or combining supplements — especially if you take medication or have a medical condition.