Korsakoff syndrome is a chronic memory disorder caused by severe deficiency of thiamine (vitamin B-1). Korsakoff syndrome is most commonly caused by alcohol misuse, but certain other conditions also can cause the syndrome.

Consumer Reports found dangerous heavy metals in chocolate from Hershey's, Theo, Trader Joe's, and other popular brands. Here are the ones that had the most, and some that are safer.

Biological changes in the gut microbiome as we age may be connected to overall healthy aging and increased survival rates, according to NIA-supported research published in Nature Metabolism. Learning more about the balance of this microbiome —