Are Fermented Foods a Miracle? Do They Help You Lose Weight?

As fermented foods have recently regained popularity, US Health Secretary Robert F. Kennedy Jr.'s statement that he lost 20 kilograms in 20 days by eating only meat and fermented foods sparked debate. Experts acknowledge that fermented products such as yogurt, kefir, kimchi, and sauerkraut may be beneficial for gut health, but they emphasize that such rapid weight loss cannot be explained by these foods alone.

According to nutrition experts, fermented foods may contain beneficial bacteria that support the gut microbiota and may have potential effects such as reducing inflammation and improving metabolic health. In particular, a study published in 2021 showed that fermented foods can increase gut microbial diversity. However, current scientific data do not provide strong evidence that they produce dramatic weight loss in a short time.

Experts also note that suddenly eating large amounts of fermented foods can cause gas, bloating, and gastrointestinal discomfort. The health effects of fermented products are said to be meaningful when considered as part of a balanced diet rich in vegetables, fruits, whole grains, and fiber.

In conclusion, fermented foods are beneficial for gut and metabolic health, but they do not make you lose weight.

Source

McCreary, J. (2026, January 27). Are fermented foods really that good for you? A gut check on RFK Jr.'s fermented foods weight-loss claim. MedPage Today.

https://www.medpagetoday.com/popmedicine/cultureclinic/119613