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Wednesday, April 22, 2026

False claim that nattokinase dissolves COVID-19 spike protein in your body | Fact check - Yahoo News

The claim: Nattokinase dissolves the spike protein found on the COVID-19 virus

A July 14 Instagram post (direct link) includes a quote from a controversial cardiologist known for spreading COVID-19 misinformation.

The video's caption quotes Dr. Peter McCullough as saying a supplement called nattokinase “is the only enzyme we’re aware of right now that dissolves the spike protein.”

McCullough says in the video that the spike protein “is loaded in the body with the COVID-19 infection and definitely with the vaccines.”

The post was liked more than 2,000 times in five days.

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Our rating: False

Experts have consistently said there is no evidence spike proteins from the vaccines pose any danger to the public or that nattokinase dissolves those proteins in the body. Public health officials have taken action against those making false claims about the supplement in advertisements.

Expert: Claim ‘in defiance of evidence’

Nattokinase is an enzyme found in natto, a meal made from fermented soybeans that is popular in Japan. It is not authorized by the U.S. Food and Drug Administration or by Health Canada as a COVID-19 treatment.

The post claims the supplement is effective at counteracting the COVID-19 spike protein, which is how the virus enters healthy cells and is the first step in infection. Experts say those proteins found in the vaccines are harmless.

Dr. Amesh Adalja, a senior scholar at...



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