Study: Intermittent Fasting Might Not Be Helpful for Losing Weight After All

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Study: Intermittent Fasting Might Not Be Helpful for Losing Weight After All
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Intermittent Fasting May Not Be All That Helpful for Losing Weight

of 36 health adults found that people lost more weight on a calorie-restricted diet compared to an intermittent fasting diet.

That doesn’t mean people can’t lose weight with intermittent fasting. “Intermittent fasting can put you in a calorie deficit but, once you’ve lost weight in the form of muscle mass and your metabolism decreases, you have to [do] intermittent fasting harder to get results,” says, a certified dietitian nutritionist practicing in New York City. “This is a losing game and, in the long term, seems doomed to fail.

The general messaging around intermittent fasting is also problematic, says Vanessa Rissetto, R.D., the CEO and co-founder of. “The messaging for intermittent fasting makes it seem as though in your window of eating you can eat whatever you want without consequence, so the kinds of foods people are taking in might not be in line with weight loss,” she says.

One of the biggest challenges with intermittent fasting is sticking with it, Dr. Bennett says. “If you don’t stick with the behavior change, the weight will come back,” she says. Keatley agrees. “It doesn’t seem to work long-term,” she says. “Having too much of a calorie or protein debt will ultimately result in less muscle mass and a lower metabolic rate, making it easier to gain fat after the diet is no longer sustainable.

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