Jaiwant Rangi, MD, FACEEndocrinologist | Founder, Lower The Dose® | Speaker

THE AGING GUT CHALLENGE

30 Jun 2026 · 1 min

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As we age, the gut's nutrient-absorbing villi shrink and the blood vessels feeding them degrade. This makes it harder to absorb B12, vitamin D, and calcium. A Lancet review confirms these changes are real and significant, not minor.

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As we age, our gut becomes less efficient at absorbing nutrients. There was a recent Lancet review that described how aging causes villus atrophy. Those are the hair-like structures inside our gut lining that absorb the nutrients. They actually shrink. The microvessel network that delivers the nutrients to your bloodstream degenerates. So aging gastrointestinal tract becomes specifically less efficient at absorbing vitamin B12, vitamin D, calcium. And this isn't just subtle. It's very well documented and it's physiological change that happens.

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