Black seed (Nigella sativa)
Thymoquinone-rich seed oil with meta-analysis evidence for modest blood-pressure and lipid improvements.
Why
Black seed (black cumin) is a staple of Middle Eastern traditional medicine; its main active constituent is thymoquinone, with antioxidant and anti-inflammatory activity. The usable clinical evidence is cardiometabolic: a meta-analysis of randomized trials found modest reductions in systolic and diastolic blood pressure, and related metas report small improvements in lipids and fasting glucose. Effects are real but small — adjunct territory, not replacement territory.
How it works
Thymoquinone — antioxidant and anti-inflammatory; proposed calcium-channel and diuretic-like contributions to the blood-pressure effect.
Expected onset · 8–12 weeks in blood-pressure trials
How to take
Dosage
1–2 g seed powder or 1–2 teaspoons (≈2.5–5 ml) cold-pressed oil daily in trials; standardised capsules vary — follow the label.
Timing
With a meal
On the label
Cold-pressed oil or extracts standardised for thymoquinone content.
Ideal for
High-normal blood pressure or mildly adverse lipids alongside diet and movement work — with home BP tracking to verify it earns its place.
Safety
Evidence
2016 J Hum Hypertens meta-analysis of RCTs — Nigella sativa supplementation lowered systolic BP by ~3 mmHg and diastolic by ~2.8 mmHg vs placebo. Modest, consistent, and worth verifying on your own home cuff over 8–12 weeks.
Where to get it
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