Nattokinase
100 mg
Structure / FunctionNattokinase is an enzyme. An enzyme is a tiny worker your body uses to get jobs done. This one comes from nattoA traditional food made by fermenting soybeans; it's where nattokinase comes from., a traditional fermented-soy food eaten for a long time. It supports healthy, comfortable blood flow — the easy warmth you feel in your hands and feet when you tend to run cold.
It works with your body's normal circulation. In a small study of healthy men, a single dose helped their skin warm back up faster after a cold dip. That points to comfortable, healthy blood flow near the surface of the skin. It also supports your body's own antioxidantA protector molecule — it steps in and defuses the unstable particles that would otherwise wear your cells down. defenses, which help keep your everyday balance steady.
Evidence · 3 studies
- A small study looked at healthy men. One dose helped their skin warm back up faster after a cold dip. That is a sign of healthy, comfortable blood flow. Nara N, Hamaoka T. Heliyon, 2023 (PMID 37483751) — double-blind, placebo-controlled crossover in 9 healthy men.PubMed →
- That same warmth-and-comfort effect may matter most for people who tend to run cold, like keeping hands and feet from getting too chilled. Nara N, Hamaoka T. Heliyon, 2023 (PMID 37483751) — authors note it may be more meaningful for those with a cold-sensitive constitution.PubMed →
- Lab work shows nattokinase supports the body's own antioxidant defenses. Those defenses help your body stay in a steady, healthy balance. Li YL, Lee IT. J Dent Sci, 2026 (PMID 41585176) — nattokinase supports the body's Nrf2 antioxidant-response pathway in human cells.PubMed →
