Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

To learn more about Yachtolt, visit yawcult.co.

.jp. That's y-A-K-U-L-T.C-O.J-P. When it comes to a guide for your gut, count on Yacult.

This is Scientific American 60-second science. I'm Dina Fine Marin. Got a minute?

A small but growing market exists on the internet for human breast milk.

Now a study finds that buyers should really beware.

Some purveyors of breast milk appear to be adulterating the product with cows' milk.

Such bovine contamination is more than just a scam.

It can be a health risk for infants who are allergic to or intolerant of cows' milk. The study,

the first document this milk fraud, is in the journal Pediatrics. Researchers purchased 102 samples

of supposed human breast milk online.

Tests found that 10 of these samples had enough bovine DNA

to indicate that at least 10% of the milk in the sample actually came from cows.

Human milk is an ideal source of nutrients for infants, when it's safe.

Prior studies on breast milk purchased online have revealed dangerous

amounts of bacterial growth than make it unsuitable for infant consumption. Since no one typically

screens these internet-sold milk products, for pathogens or other contamination, it's up to consumers

to protect themselves. Some human milk banks do voluntarily screen their products,

so it's best to check with local departments of health to find safe products.

Thanks for the minute. For Scientific American 60 Second Science, I'm Dina Fine-Maring.

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