'Losing 23 pounds in three weeks is too fast,” Warren says, especially since people who lose weight slowly are much more likely to keep it off. Therefore, it’s not a long-term solution.”Īnd given that Warren says a safe amount of weight to lose is about two to three pounds per week, well, 12-plus pounds is.not that. “However, once you begin to eat carbohydrates again, your weight will increase. “The weight loss may seem more rapid because without carbohydrate stored as glycogen, you lose fluid,” she explains. And yeah, if you do this, you’ll lose weight, says Beth Warren, R.D., founder of Beth Warren Nutrition and author of Living a Real Life with Real Food. So, the claims of melting belly fat are just bogus.”į offers a little bit more info about the diet and says that it has three phases, with phase one being the most intense.ĭuring that time, people eat just protein and vegetables.

'You'd also lose a lot of muscle mass at the same time. That's a big red flag, says Julie Upton, M.S., R.D., co-founder of nutrition website Appetite for Health.Īnd the news about the 3 Week Diet just gets worse from there: “Losing 12 to 23 pounds in three weeks sounds appealing but it would require a very, very low calorie intake with significant exercise to create such calorie deficits,' she says. The diet's website doesn’t offer up a ton of details about how it works-you've gotta pay for that kind of intel. To follow the diet, people need to order the “3 Week Diet System,” which includes:Īll for the low, low price of $47! But Does The 3 Week Diet Really Work? He also shares exercises he says will burn fat quickly. The plan combines a lower-calorie diet with intermittent fasting, a slashed carb intake, exercise, and a supplement routine.įlatt told Business Insider that his diet helps people know exactly what to eat, how much of it to eat, and when to eat it in order to maximize weight loss.

The 3 Week Diet was developed by health and nutrition coach and personal trainer Brian Flatt, who says on his website that it can help you lose 12 to 23 pounds of body fat from your waist, hips, thighs, belly, and butt in that span of time.

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