Holy Basil (Tulsi) for Blood Sugar Balance
Tulsi shows small glucose-lowering effects in a handful of trials of modest quality.
Overview
Verdict
How It Works
Dosing & Protocol
Typical dose
- Recommended dose
- 300-1000 mg/day holy basil (tulsi) leaf extract in divided doses with meals, or 2-3 cups of tulsi tea daily
- Expected timeframe
- 8-12 weeks
Protocol
- form
- Standardised leaf extract, or dried leaf as tea. Trials used a range from 300 mg to 1 g/day of extract and up to 2.5 g/day of leaf powder, with considerable variation in preparation
- duration
- 12 weeks, with fasting glucose and HbA1c at baseline and end
- co factor
- Take with meals. Evidence is mixed but not negligible. Several small randomised trials, mostly conducted in India in people with type 2 diabetes or metabolic syndrome, report reductions in fasting and post-prandial glucose with holy basil leaf extract, with effect sizes in the range of 0.5-1.5 mmol/L for fasting glucose, and a systematic review concluded the direction of effect is favourable. The limitations are substantial: trials are small, often poorly blinded, use widely differing preparations and doses, and few report HbA1c. This is worth a monitored trial as an adjunct, not a replacement for established treatment.
- titration
- Increase to 500-1000 mg/day in divided doses over two weeks if tolerated
- starting dose
- 300 mg/day of leaf extract with a meal, or one cup of tulsi tea twice daily
Evidence
What the studies say
Holy basil (tulsi) lowers fasting glucose and improves lipid profile in adults with metabolic disease: a meta-analysis of randomized clinical trials
Jamshidi N, Da Costa C, Cohen M
Tulsi significantly lowered fasting blood glucose and improved total cholesterol, LDL and triglycerides.
Safety
Caveats
Do not stop or reduce prescribed diabetes medication to use holy basil - uncontrolled diabetes causes irreversible eye, kidney and nerve damage, and any medication change must come from your prescriber. Safety ceiling and interactions: holy basil lowers blood glucose, so combining it with insulin or sulfonylureas risks hypoglycaemia - monitor closely and discuss dose adjustment with your clinician. It has antiplatelet activity and may increase bleeding risk with warfarin, DOACs, aspirin and clopidogrel; stop two weeks before surgery. Animal studies suggest possible antifertility and anti-spermatogenic effects with long-term high doses, and holy basil may have uterine-stimulant activity - avoid in pregnancy, when trying to conceive, and while breastfeeding. It may interact additively with pentobarbital and other sedatives. There is no established upper intake level and limited long-term human safety data.
Less likely to help if
Medical Disclaimer
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Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.