The best diet for losing weight is Weight Watchers, according to the experts who rated the diets below for U.S. News. Volumetrics came in second, and Jenny Craig and the vegan diet were third on this overall weight loss ranking list, which takes into account short-term and long-term weight loss scores. Some other diets performed as well or better in our rankings for enabling fast weight loss, but long-term weight loss is more important for your health.
For even more impressive effects on body composition: aim for exercise forms which elicit a positive hormonal response. This means lifting really heavy things (strength training), or interval training. Such exercise increases levels of the sex hormone testosterone (primarily in men) as well as growth hormone. Not only do greater levels of these hormones increase your muscle mass, but they also decrease your visceral fat (belly fat) in the long term.

The truth is there is no “one size fits all” solution to permanent healthy weight loss. What works for one person may not work for you, since our bodies respond differently to different foods, depending on genetics and other health factors. To find the method of weight loss that’s right for you will likely take time and require patience, commitment, and some experimentation with different foods and diets.
This high-fat, adequate-protein, low-carb fad diet sends the body into a state of ketosis, in which the body uses stored fat for energy. Research published in Clinical Cardiology suggests the ketogenic, or “keto,” diet can be an effective weight loss method, but to be successful, you must follow the plan consistently with no cheat days — otherwise, you’re just eating a high-fat diet that may be high in unhealthy fats for no reason. (1) (A pro tip? If you're planning on doing the diet, consider perusing this complete keto food list and reading up on the healthiest fats for keto diet followers.)
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.
You've got 28 days to get to your goal, so we've recruited Juge to help you every step of the way. He's adapted a traditional bodybuilding competitor's diet for a noncompetitor (that means you!) who wants to look his best, shedding as much fat as possible in a very short time. With just under a month, there's no time to fool around, so get started on your high-protein meal plan now to lose weight and build muscle while you're at it. Go to the grocery store and stock up tonight. Come breakfast time tomorrow, follow his plan as strictly as you can and get ready to show off those impressive muscles in a month.
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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