Intermittent fasting (IF) is an approach to eating based on timing. The idea is that fasting for long enough allows insulin levels to fall low enough that our body will use fat for fuel. Growing evidence in animals and humans shows that this approach leads to significant weight loss. When combined with a nutritious, plant-based diet and regular physical activity, IF can be part of a healthy weight loss or maintenance plan, as I described in an earlier blog post.
Now, a randomized controlled trial published in JAMA claims that IF has no significant weight loss benefit and a substantial negative effect on muscle mass. News outlets picked up the story and ran headlines like A Potential Downside of Intermittent Fasting and An Unintended Side Effect of Intermittent Fasting.
But what did this study actually look at and find?
In the study, 141 patients were randomly assigned to … Read the rest