This high-protein, fat-rich plan claims you will lose up to 15 pounds in two weeks, but the unhealthy fat content drops the diet’s ranking. Similar to the ketogenic diet, the idea is that by severely restricting your carb intake, your body will have to burn fat for energy. Atkins has a decent amount of short-term research to support the premise, but the results are mixed. The American Heart Association links saturated fats—prevalent in this plan—to heart disease. Other negatives for Atkins are that it’s tough to sustain, and you’ll miss out on fiber and other nutrients in complex carbohydrates like whole grains. Check out the 15 best Atkins diet foods you can get at the grocery store.
This well-known plan promises weight loss of up to two pounds per week, and it has plenty of evidence to back it up. The bonus is that it’s built around real food. Weight Watchers has a strong community to support your success and offers personal coaching for an additional cost. The latest plan, WW Freestyle, has 200 zero Points foods, which makes tracking what you eat less of a burden. If you have a sweet tooth, this plan may be tough because sugar is heavily penalized. Weight Watchers doesn’t accept children under 13, pregnant women, or those with eating disorders. Find out which supermarket foods are best for weight loss.
Your habits and cravings may both rear their heads at restaurants, where it's easy to blow your diet in seconds. To stick to the plan, says Juge, be diligent in ordering. "Ask them to grill your meat without oil or grease. Ask for steamed vegetables with no butter. Get a salad (no cheese) with either fat-free dressing or a vinaigrette." After his 14 years in bodybuilding, Juge testifies that he's found many restaurants are accommodating, so there's no reason to avoid them as long as they'll cook to your preferences.

Second, take a few photos of yourself to keep your motivation up. "Most of the people who come to me are doing it for a reason," he explains. "They're going on vacation, competing in a bodybuilding show, or maybe going to a reunion. I always have them strive for that goal. I take front, side, and back pictures of them at the beginning and have them post the photos on their mirror at home. I tell them, just keep looking at that picture and think of what you're going to look like in a few weeks."


With this eating style, you’re looking at a lot of menu planning and preparation. A review published in August 2017 in Nutrients suggests the diet could lead to weight loss, but the Academy of Nutrition and Dietetics warns the plan could also cause certain nutrient deficiencies, such as in calcium and vitamin D. (3,4) And, therefore, according to an article published in the January–February 2016 issue of the Royal Australian College of General Practitioners, anyone at risk for osteoporosis should avoid it. (5)

Some people feel better supplementing the already active T3 (sometimes prepared from pig thyroid glands), as it can give a stronger effect than the T4 hormone, but its effect is often harder to control. Swedish healthcare rarely prescribes or offers such T3 treatment, as it often lacks advantages and may pose a risk when doses are high for an extended period of time.
Eat at least 1g of protein per pound of bodyweight, daily. If your protein intake is too low on a restricted-calorie diet, you'll lose a lot of muscle in addition to any fat you're lucky enough to shed. A high-protein intake will help you preserve lean mass during your dieting phase. Choose lean, high-quality proteins like egg whites, poultry, lean red meat, and protein supplements. The diet provided here contains about 220-250g of protein daily, fine for a male weighing 200-250lbs. Up your protein only if you're heavier than 250lbs, or you're very hungry and need to add food during the day. Juge suggests an additional protein shake for an easy quick fix. (If you're under 180lbs, cut out 3oz of meat or chicken per day from the diet.)
Meal prep, short for meal preparation, is the process of planning and preparing your meals ahead of time. You can meal prep one day ahead, or take one day to prepare lunch and/or dinner for an entire week. While most meal prep only one or two meals, you can easily meal prep breakfast, lunch and dinner, even snacks for the week ahead. It’s entirely up to you!

Becky Duffett is a contributing nutrition editor for Fitbit and a lifestyle writer with a passion for eating well. A former Williams-Sonoma cookbook editor and graduate of San Francisco Cooking School, she’s edited dozens of cookbooks and countless recipes. City living has turned her into a spin addict—but she’d still rather be riding a horse. She lives in the cutest neighborhood in San Francisco, spending weekends at the farmers’ market, trying to read at the bakery, and roasting big dinners for friends.
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