Diet & Nutrition

Google searches for this question have shot up in recent weeks. I’m not surprised. An unprecedented number of people went keto in January purely as a quick weight loss hack, and now they’re looking to transition off of “this weird diet.” Tortillas and bagels beckon, after all. This is the wrong way to approach keto—obviously....

For today’s edition of Dear Mark, I’m answering three questions. You guys had more questions about folate. Since it’s such an important vitamin, I answer those first. Then I discuss the study mentioned in last week’s Dear Mark in which removing polyphenol-rich fruits and vegetables from the diet improved oxidative stress markers instead of worsening them....

For today’s edition of Dear Mark, I’m answering three questions from readers. First, what do I make of the recent study showing a link between lung cancer in men and supplementation with vitamin B6 and vitamin B12? Next, how stable is folate in liver? Other foods with high folate content before cooking, like legumes and...