"When going out for fast food, I used to get the large-size value meal. Now, I satisfy a craving by ordering just one item: a small order of fries or a six-piece box of chicken nuggets. So far, I've shaved off 16 pounds in seven weeks, and I'm on track to being thinner than my high school self for my 10-year reunion later this year." —Miranda Jarrell, Birmingham, AL
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)

Health.com is part of the Meredith Health Group. ©, Copyright 2019 Meredith Corporation. All rights reserved. The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments. All products and services featured are selected by our editors. Health.com may receive compensation for some links to products and services on this website. Offers may be subject to change without notice. Privacy Policythis link opens in a new tab Data Policythis link opens in a new tab Terms of Servicethis link opens in a new tab Ad Choicesthis link opens in a new tab EU Data Subject Requeststhis link opens in a new tab Your California Privacy Rightsthis link opens in a new tab Web Accessibilitythis link opens in a new tab


Christy Brissette, MS, RD is one of North America's top dietitians and a leading nutrition and food communications expert. She is the President of 80 Twenty Nutrition, a nutrition and food media company. Her mission is to end food confusion and dieting once and for all. Christy appears on national TV and is interviewed for international magazines, radio and websites. She empowers her clients to look and feel their best with the healing power of healthy, delicious food. She helps clients achieve results through cutting-edge, creative and fun meal plans and recipes. You can still enjoy your favourite foods and have the body of your dreams!

If the diet is a quick fix rather than one that promotes lasting lifestyle changes, this could pose a problem. In particular, extreme diets that promise big weight loss up front aren’t always sustainable — and you may end up overeating or even binge eating if you feel deprived. “Consider if the diet’s habits are ones you can continue throughout your lifetime, not just 21 or 30 days,” says Angie Asche, RD, a sports dietitian in Lincoln, Nebraska.


When you drink liquid carbs, like the sugar in soda, your body doesn't register them the same way as, say, a piece of bread, according to a review of studies published in Current Opinion in Clinical Nutrition & Metabolic Care. That means, even though you're taking in calories, your fullness cues aren't likely to signal that you're satisfied once you finish off a can. And that can lead to consuming more overall.
Aim to do ab work 3 or 4 times a week on non-consecutive days with at least 24 hours of rest in between sessions, says Gagliardi. During those sessions, you can start with simpler moves like crunches, bicycle crunches, and planks. Even though you may only be directly targeting your abs 3 or 4 times a week, you should still be activating your core (aka, tightening your ab muscles) in every workout you do, says Gagliardi.
"If a client has come to me looking to lose 10 pounds, I would tell them to simply move. Move more, and more often. Walk or bike ride to class or work, even park further away from your location in the parking lot. Take the stairs or take a walk during lunch. You don't have to spend hours every day in the gym sweating, but you do have to make a conscious effort to move more, and sit less. This works great because it doesn't feel like work and you're burning more and more calories throughout the day." — Ajia Cherry, personal trainer and Founder at Functional Innovative Training

While there are many vegetarian factions, all of them share the same basic dicta: no fish, meat, or poultry. But that’s where the similarities end for this eating plan/lifestyle practiced by 18% of the world population. Studies suggest that a vegetarian diet is good for reducing cancer risks, stabilizing blood sugar, and promoting heart health, while others raise a flag regarding nutritional deficiencies including Omega 3, vitamin B, calcium, and iron. Plans range from the most flexible to the most restrictive. Here are two of the most popular examples of each extreme:
When it comes to the "best" diet for most people, this one consistently ranks at the top of every list. If you can't afford a cruise to the Mediterranean (yet!), at least you can eat like the beautiful, long-living, and famously healthy people from the region. The Mediterranean diet teaches you to eat like a Sardinian, one of the "blue zones" identified by researchers as having a high number of people living past 100—by eating more fish, olive oil, healthy fats, and fresh vegetables. The point is to have not just a longer life but also a healthier and happier one, whether you're trying to lose weight or not. (Really—research shows that you can reap the benefits of the Mediterranean diet without cutting calories.)
Another healthy change that will help you look better is to cut back on salt. Sodium causes your body to hold onto excess water, so eating a high-salt diet means you’re likely storing more water weight than necessary. If you’re in a rush to lose weight fast, cut out added salt as much as possible. That means keep ditching the salt shaker and avoiding processed and packaged foods, where added salt is pretty much inevitable.
CBS News takes viewers inside the real-life challenges facing migrant families split apart by the Trump administration's "Zero Tolerance" policy. The documentary provides an immersive look at the hotly debated issue through the eyes of those impacted the most — the fathers, mothers, sons and daughters separated and unaware when they'll see their family members again.

"People should pick activities they enjoy and that fit into their lifestyle in order to increase their chances of sticking with it to lose the last 10 pounds. For those who have hit a weight-loss plateau and can't seem to lose that weight, you'll need to mix things up in order to see results. Tabata-style training, HIIT classes and resistance training can all be effective weight-loss modalities for the right person." — Timothy Lyman, ACE certified personal trainer and Director of Training Programs at Fleet Feet Pittsburgh


Because the diet isn’t as restrictive as a traditional vegan or vegetarian diet, it may be simpler to stick with — hence its No. 2 ranking in U.S. News & World Report’s Easiest Diets to Follow category. Because you’ll be eating meat some of the time, you may also be at a lower risk of the aforementioned nutrient deficiencies that vegetarians and vegans may face.
When it comes to the "best" diet for most people, this one consistently ranks at the top of every list. If you can't afford a cruise to the Mediterranean (yet!), at least you can eat like the beautiful, long-living, and famously healthy people from the region. The Mediterranean diet teaches you to eat like a Sardinian, one of the "blue zones" identified by researchers as having a high number of people living past 100—by eating more fish, olive oil, healthy fats, and fresh vegetables. The point is to have not just a longer life but also a healthier and happier one, whether you're trying to lose weight or not. (Really—research shows that you can reap the benefits of the Mediterranean diet without cutting calories.)
Interested in following a more historical approach to eating? The Primal Blueprint is similar to the Paleo diet, which has roots in how our long-ago ancestors supposedly ate. This plan ditches grain, sugars, and processed foods while focusing on clean eating with plenty of protein (both animal- and plant-based), lots of vegetables, fruits, and healthy fats. The Primal Blueprint acknowledges other health factors too, advocating for lots of low-intensity activity, some high-intensity exercise, strength training, and plenty of sleep.
When we began our research on Nutrisystem, the first thing that stood out to us was the variety of  plans they offer. In total, there are nine different options, including plans for diabetics, vegetarians, and even special diets for men (a rarity in the diet industry). Also, most of their plans are highly customizable, so if you don’t like their recommendations you can customize your meal plan from chef-created menu items including staples like chicken masala, cheesesteak pizza, muffins, burgers, popcorn, and lots more.
After thoroughly researching the most popular and expert-recommended diet plans, we determined that all the diet plans to be included in our "Best of" list should meet the criteria stated below. However, there is one very important factor that, though essential to a person’s decision on whether or not to begin a diet, we could not review first hand: that factor is taste. 
The researchers explain that people who cook their own meals may simply have other good-for-you habits, like exercising more. However, they also concluded that home cooks ate more fruits and vegetables (along with a wider variety of foods), have healthier methods of prepping their food, and splurge less on foods high in calories and sugar. Consider any of the healthy eating books below to get started.
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.)

"A study by David Jenkins, MD, PhD—the University of Toronto pioneer in low-glycemic eating — demonstrates that eating small portions at frequent intervals is good for your health in a number of remarkable ways. Within the study, they found that people who ate every three hours reduced their blood cholesterol by over 15% and their blood insulin by almost 28%. That's key, because in addition to regulating your blood sugar level, insulin plays a pivotal role in fat metabolism, inflammation and the progression to metabolic syndrome. When your body produces less insulin, you're much less likely to convert dietary calories into body fat.
If you want to lose weight fast, your best bet is the HMR Program, according to the health experts who rated the diets below for U.S. News. While these diets enable quick weight loss for those with a short-term goal – there's a strong chance you'll drop significant weight within the first 12 months – keep in mind that this is markedly different from long-term weight loss, which is more important for your health.
Rather than rely entirely on the information provided by the companies to determine weight management effectiveness, we spent weeks browsing through hundreds of unpaid customer testimonies (not endorsed by any company) to get a feeling on the accuracy of the claims they make. In fact, these testimonials provided us with a much more truthful and in-depth insight regarding how effective diet plans really are. 
If you’re only getting a minimal amount of sleep each night, that leaves more time for you to snack and make otherwise unhealthy decisions that could affect your weight loss. Although it will vary from person to person on how much sleep you actually need to be most effective (and therefore make progress toward your weight loss goals), the ideal number is typically 7 or 8 hours, says Dr. Cheskin.
×