A hormone released during exercise might protect against Alzheimer’s

A hormone released during exercise may protect the brain against Alzheimer’s disease. It may also explain the known positive effects of exercise on mental performance. Irisin is a hormone generated by muscle tissue that is carried around the body in the bloodstream. Fernana de Felice at the Federal University of Rio de Janerio and colleagues found that people with Alzheimer’s had lower levels of the hormone compared with healthy individuals.

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