Can Nattokinase Reverse Atherosclerosis?
In a Nutshell
Nattokinase, an enzyme from traditional Japanese fermented soybeans (natto), is linked to 25% lower cardiovascular mortality in observational studies and showed promising reversal of atherosclerosis in a 1-year study of 1,062 people taking 10,800 FU daily: carotid intima-media thickness dropped 21.7%, plaque area 36%, with improved lipids (triglycerides -15.7%, LDL -18.1%, HDL +15.8%). It works via anti-thrombotic (fibrin breakdown), anti-hypertensive (ACE inhibition, e.g., 5.6/2.8 mmHg BP drop in RCT), and antioxidant effects. Therapeutic dosing starts at 6,000 FU/day, well-tolerated up to 14,000 FU, making it a biologically plausible, accessible option for heart health.
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Summary of research on nattokinase, one of the most misunderstood and talked about supplements in heart health. Questions: What is it? Where does it come from? Can it reverse atherosclerosis? This enzyme from fermented Japanese soybeans has bold claims rooted in over a thousand years of tradition. Some studies link nattokinase to lower cardiovascular mortality, improved lipid markers, or reversal of arterial plaque. Data have limits and nuances. Video breaks down: what it is, how it works, research, dosing protocols. Check Stay Curious Metabolism newsletter for references, details, and five-ingredient heart health stack.
Four chapters:
- What natto is, origins, lore, link to decreased cardiovascular disease death.
- Human study suggesting nattokinase improves or reverses atherosclerosis.
- Mechanisms of nattokinase for cardiovascular health (anti-thrombotic, anti-hypertensive, antioxidant).
- Dosing protocols.
Natto is traditional Japanese fermented soybean made by fermenting soybeans with Bacillus subtilis bacteria. Consumption dates back about 1,000 years. Legend: 11th-century samurai Minamoto no Yoshi's troops boiled soybeans for horses, were attacked, packed beans in straw bags, fled; beans fermented naturally. They tried them, natto was born.
Natto intake associated with longer life, lower rates of cardiovascular disease and related death. Study: 29,000 participants followed 16 years tracking cardiovascular mortality. Highest quartile of natto consumption vs. lowest: 25% lower risk of dying from cardiovascular disease. Observational study, possible healthy user bias, but no significant associations with total soy protein or other soy foods. Signal specific for natto.
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