Disclaimer: I am not a doctor and this is NOT medical advice. I am simply gathering this information for my own use, mostly from articles, blogs, google or LLMs (all fallible sources that could contain material inaccuracies or falsehoods). Consult your doctor before taking any supplements or medications.
Nattokinase is an enzyme derived from fermented soybeans (natto). Reputable supplements are typically standardized and labeled in “FU” units (not just mg), as this measures enzymatic activity. Quality varies significantly – independent testing shows that some products deliver far less (or occasionally more) activity than is claimed on the label.
Look for third-party testing for potency (actual FU activity), purity and contaminants (heavy metals, microbes). Use a patented or well-characterized strain, such as NSK-SD (a common, high-quality nattokinase extract). Look for transparent labeling with exact FU per serving (common doses 2,000-4,000 doses per capsule)
Pure Encapsulations NSK-SD supplement uses the well-regarded NSK-SD strain
General caution: Supplements are not FDA-approved to treat or prevent disease. Evidence for nattokinase is promising but still emerging (mostly smaller studies or observational data for plaque/circulation support). It’s not a substitute for medical care, lifestyle changes, or prescribed treatments.
MGD’s 