Want to Live Longer? Fuel Your Gut Microbiome

What you eat doesn’t just feed you—it feeds trillions of hungry microbes in your gut that may influence how well and how long you live. These microbes (a mix of bacteria, fungi, and other single‑celled organisms) are mostly concentrated in your digestive tract.

These chemists not only help you break down your meals but also produce essential nutrients you can’t make on your own, protect you from disease, and influence which parts of your DNA are switched on or kept quiet.

Scientists studying centenarians in Italy, Japan, China, and other regions have found that those who reach old age in relatively good health tend to have more diverse gut microbiomes. Researchers often describe microbiome diversity with alpha‑diversity scores (how many different microbes you carry and how evenly they’re distributed) and uniqueness measures that capture how distinct your overall gut profile is from other people’s.

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