My uncle is a doctor (Cardiologist), but he mentioned many times that too much red meat is bad for the digestion, and eaten too frequently (including Big Mac's, etc.) can cause high cholesterol, and even cancer down the line. The cultures that seem to eat the least red meat ( mine for instance....red meat doesn't fit into the traditional diet too much) seem to be the healthiest, those that have the most....less so.
Mediterranean diet seems to be the healthiest, as well as Chinese and Japanese cuisene. USA and British among the worst. Sorry....I looked it up to verify.