By Tanner Garrity Historically, men’s magazines haven’t given cognitive health the attention that it deserves. “DEFEAT DEMENTIA IN 60 YEARS” doesn’t have quite the same ring as “BUILD ABS IN SIX WEEKS.” But the rate of Alzheimer’s is rising rapidly in America, and the disease could impact 13 million people by 2050. Instead of focusing solely on this summer’s ideal beach body, it’s important to consider the influence that decisions made today will have on your body and brain several decades from now. Fortunately — where nutrition is concerned — there’s a real opportunity to have your cake and e…