No evidence for vitamin and mineral supplementation for maintenance of cognitive function in adults

There was no good evidence to suggest that middle‐age or older people could preserve cognitive function or prevent dementia by taking vitamin or mineral supplements. Vitamins were considered broadly in the categories of B vitamins (B6, B12 and folic acid), antioxidant vitamins (beta-carotene/vitamin A, vitamins C and E) and combinations of both. Chromium was the only mineral considered. There were a few positive results associated with long‐term use of antioxidant vitamins, particularly beta‐carotene and vitamin C, although the effects were small.