Can supplements keep your brain sharp? Why the evidence is more complicated than it seems

MedicalXpress | июн 22, 2026

Many of us would like to keep our brains sharp as we get older. That has helped create a growing market for "brain-health" supplements. These include fish oil capsules and postbiotics, the beneficial, nonliving compounds and byproducts produced by "good" gut bacteria (probiotics) when they digest dietary fiber or prebiotics.