Metformin linked to worse cognition in older people

Metformin is associated with worse cognitive function in older adults, which could be explained by vitamin B deficiency, new research suggests.
Northern Irish researchers investigated the relationship between hyperglycemia, metformin and vitamin B status in 4160 community-dwelling, dementia-free older people (mean age 74) participating in the Trinity, Ulster and Department of Agriculture (TUDA) study.