U.S. Dietary Guidelines Recommend Fermented Foods as Focus on Gut Health Intensifies

The latest U.S. dietary guidelines encourage Americans to eat more fermented foods, aligning with a growing public focus on gut health driven by trends like fibermaxxing and personalized microbiome treatments. While popularized by Robert F. Kennedy Jr.’s Make America Healthy Again movement, experts note that fermentation has scientific backing. Microbes in foods like yogurt and kimchi help balance the gut, though experts warn against sugary, mass-produced probiotic products.

Claims

• ▪Fermented foods have been popularized by followers of United States Health Secretary Robert F. Kennedy Jr.'s Make America Healthy Again movement.
• ▪Health experts have questioned other diet fads championed by the Make America Healthy Again movement, including unproven claims about raw milk and seed oils.
• ▪Fermentation is a process where naturally occurring microbes, including bacteria and yeast, break down and preserve food.
• ▪Dr. Lisa Ganjhu of New York University Langone Health states beer and wine are fermented but can negatively influence the gut microbiome.
• ▪Stanford University research dietitian Dalia Perelman suggests aiming for two servings of fermented foods daily to support gut health.
• ▪The United States federal government's latest dietary guidelines specifically encourage Americans to eat more fermented food.
• ▪Public focus on gut health is rising alongside mainstream interest in fibermaxxing, increasing colorectal cancer in young adults, and personalized gut microbiome treatments.
• ▪Some fermented foods like yogurt provide live probiotics, while others like sourdough bread lose live microbes during baking or processing.
• ▪Microbes in fermented foods help predigest food and keep the gut in balance by competing with less beneficial bacteria.
• ▪Dietitians and doctors warn against mass-produced products, sodas, chocolate, or processed foods that market themselves as probiotic.

4 sources