NEW YORK (AP) — So is red meat good or bad for you? If the answer were only that simple.

A team of international researchers recently rattled the nutrition world by saying there isn't enough evidence to tell people to cut back on red or processed meat, seemingly contradicting advice from prominent health experts and groups including the American Cancer Society and American Heart Association.

But the researchers didn't say people should eat more meat, or that it's healthy. No new studies were conducted, and they reported no new understanding of meat's effects on the body. Instead, the papers of...