We pulled the top 14 of the best commercial diets (marketed to the public for profit) and the top 12 of the best diets overall. We also threw five of the most popular diet apps into the mix. Since these are largely tracking devices that don’t espouse unique eating habits, they don’t appear to meet US News’ definition of diet, but are still potentially effective weight loss tools.
Reviews.com has an advertising relationship with some of the offers included on this page. However, the rankings and listings of our reviews, tools and all other content are based on objective analysis. For more information, please check out our full Advertiser Disclosure. Reviews.com strives to keep its information accurate and up to date. The information in our reviews could be different from what you find when visiting a financial institution, service provider or a specific product’s website. All products are presented without warranty.
Capsaicin, the compound in chili peppers that makes them hot, may speed up your metabolism, according to a study in Physiology & Behavior. Researchers say capsaicin activates your sympathetic nervous system, and that the effect on metabolism can last for more than 4 hours after eating. For recipe ideas, check out this beginner's guide to herbs and spices.
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.
Just because Fluffy is on a diet doesn’t mean you can’t reward her with a few treats now and then. We love Twin Critters’ low-calorie cat treats because they’re made only with 100% pure whitefish, nothing else. They’re incredibly low in fat and calories, which is great when you want to treat a cat with weight issues. They’re also high in Omega-3 fatty acids, which promotes a healthy skin coat.
You already know that a perfect diet doesn't exist, but many of us still can't resist the urge to kick ourselves when we indulge, eat too much, or get thrown off course from restrictive diets. The problem: This only makes it more difficult, stressful, and downright impossible to lose weight. So rather than beating yourself up for eating foods you think you shouldn't, let it go. Treating yourself to about 200 calories worth of deliciousness each day — something that feels indulgent to you — can help you stay on track for the long-haul, so allow yourself to eat, breathe, and indulge. Food should be joyful, not agonizing!
Basically, the effect of exercise on our weight is vastly overrated. That’s why it’s only number 15 on this list. There are other things you need to take care of first. It’s not a good idea to eat bad food, drink sugar water (so-called “sports drinks”) or be on medications which force you to exercise for hours daily just to compensate. Metaphorically that’s like digging a hole, into which you put your ladder, on which you stand and paint the basement-level windows of your house.

This drug is an injected variant of a satiety hormone called GLP-1. It slows down how quickly the stomach empties and tells the brain that you don’t need to eat yet – a great idea for losing weight. As a bonus this drug works fine while one is on the keto diet and it works even better with intermittent fasting – for a rapid weight loss with no hunger.
Using a layered approach is another great way to build a good veggie habit. For example, start with a food you already enjoy — say, pasta — and layer some veggies into your bowl. This can help you explore a new food with one you already love eating, and from there, you can try new ways to savor it. Take spinach, for instance. After trying it with pasta, you may want fold it into an omelet or another favorite food, or explore it on its own with different cooking techniques (sautéed or steamed) or different flavor additions (garlic or golden raisins). The possibilities are limitless!
The data behind its efficacy is strong; according to a systematic meta-analysis of scientific studies published in 2004 in the American Journal of Clinical Nutrition, a 3×120 mg per day dose of orlistat nearly doubles the likelihood that you’ll achieve what doctors deem “clinically significant” weight loss over the course of a year on the supplement.  This amounts to ten percent of your body mass (2). 

Refined white breads are simple carbohydrates that your body processes as sugar, and can really hinder your weight-loss efforts. Whole grain bread, on the other hand, is chock-full of slimming fiber and can help you feel fuller, longer. Just be sure to read your labels. “If the ingredients at the top of the ingredient list read sugar, sucrose, fructose, corn syrup, white or wheat flour, these foods contain mostly simple carbs and should be limited,” Rebecca Lewis, RD, told Eat This, Not That! in our article for 20 Secrets for Eating Bread Without Getting Fat. “A food is only considered a whole grain if the first ingredient on the packaging says, ‘whole grain’ or ‘whole wheat.’”

Sugar contains calories but nothing else, and "empty calories" are the last thing you want on a diet, says Stephanie Karpinske, MBA, M.S., R.D. Sugar is also digested quickly so you're hungry soon after you eat it. It raises insulin levels, which promotes fat storage. Plus, it can be addictive because it raises levels of serotonin -- the feel-good chemical in the brain that helps us relax during times of stress. That's one reason why weaning yourself off sugar is so difficult.


A single serving of beer, wine, or spirits clocks in at about 125 calories, and it's obvious that those calories can add up if you overindulge. Thing is, it doesn't end there. Ever notice that during a night of drinking, a plate of chicken wings or nachos suddenly appears in front of you? A recent study published in Obesity helps explain why. Researchers found that alcohol makes women's brains more sensitive to the smell of food, leading them to eat more.
Conversely, the more food in front of you, the more you’ll eat—regardless of how hungry you are. So instead of using regular dinner plates that range these days from 10 to 14 inches (making them look empty if they’re not heaped with food), serve your main course on salad plates (about 7 to 9 inches wide). Instead of 16-ounce glasses and oversized coffee mugs, return to the old days of 8-ounce glasses and 6-ounce coffee cups.
You may say you want to lose weight to feel good about yourself. “Why?” Noom asks again. “It’s like peeling back the layers of an onion,” Noom explains, “And yes, tears might be involved too!” By the time our tester answered the third “Why?” she had indeed gone deep — even in the guise of a 40-year-old mom. The ultimate Why she came up with: “To enjoy life and bring joy to others.”
Call it what you will: An eating plan, a lifestyle, a diet, a philosophy, but few things garner such heated debate as how to lose weight. The truth is, whether you’re on a low-carb keto program, devoted to the Paleo lifestyle, all in to the Whole 30 or remain committed to low-fat eating, these plans have more in common than you think. What’s more, follow any one of them religiously, and you’ll likely notice results.
A. "Because no matter how you drop pounds -- whether it's through dieting, exercise, or a combination of both -- you will inevitably lose some muscle, and that slows down your basal metabolic rate," explains Jackie Newgent, R.D., a New York City based nutrition consultant. Strength training with weights throughout your weight loss period can help preserve a lot but not necessarily all of it. "Then, when you regain the weight, you'll most likely put on more fat than muscle, which reduces your percentage of lean body mass, leaving you with a slower metabolism than you had prior to the weight loss."
A University of Vermont study found that online weight-loss buddies help you keep the weight off. The researchers followed volunteers for 18 months. Those assigned to an Internet-based weight maintenance program sustained their weight loss better than those who met face-to-face in a support group. These are 50 ways you can lose weight without a lick of exercise.

"These diets are so restrictive that of course you're going to lose weight fast because you're not eating enough calories to sustain basic activities of your body, let alone any exercise. That's nothing that any person can sustain for the long term," Hogan said. "The weight's going to come back if you do lose any weight, and then it's going to be harder to lose weight in the future."

Obviously, it’s still possible to lose weight on any diet – just eat fewer calories than you burn, right? The problem with this simplistic advice is that it ignores the elephant in the room: Hunger. Most people don’t like to “just eat less”, i.e. being hungry forever. That’s dieting for masochists. Sooner or later, a normal person will give up and eat, hence the prevalence of “yo-yo dieting”.
Don't underestimate the role that your physician can play in your weight loss journey. Your doctor can help you to understand how weight loss can improve your health. He or she can also provide support and referrals to other professionals like a registered dietitian who can help make weight loss easier for you or a behavioral health specialist to manage emotions that affect eating. The support you get from a physician, a nurse or a registered dietitian can help you to stay motivated and on track when typical challenges arise.

Very low levels of thyroid hormone usually indicate an autoimmune reaction to the thyroid gland itself. This means you’ll have to take thyroid hormone supplements orally, usually the stable form T4 (Levaxin), which your doctor can prescribe for you. Your body will transform this into the active T3 hormone when necessary. The supplement dose should be adjusted so that you reach normal hormone levels (TSH, T3, T4) and sufficiently alleviate symptoms – though a few people feel best when keeping TSH slightly below normal.


Snacking is the key to Mary Rogerson’s 60-pound weight loss but it’s not just how often she eats but what. “I aim to eat at least seven servings of vegetables a day, along with some protein, every few hours,” she says. “And The best part is that by the time she’s loaded up on her rainbow of produce, she’s usually too full to eat much else and her cravings for sweets have gone way down.

Get all that? Basically, the differences between groups were minimal. Yes, the low-fat group dropped their daily fat intake and the low-carb group dropped their daily carb intake. But both groups ended up taking in 500 to 600 calories less per day than they had before, and both lost the same average amount of weight (12 pounds) over the course of a year. Those genetic and physical makeups didn’t result in any differences either. The only measure that was different was that the LDL (low density lipoprotein) was significantly lower in the low-fat group, and the HDL (high density lipoprotein) was significantly higher in the low-carb group.


Using a layered approach is another great way to build a good veggie habit. For example, start with a food you already enjoy — say, pasta — and layer some veggies into your bowl. This can help you explore a new food with one you already love eating, and from there, you can try new ways to savor it. Take spinach, for instance. After trying it with pasta, you may want fold it into an omelet or another favorite food, or explore it on its own with different cooking techniques (sautéed or steamed) or different flavor additions (garlic or golden raisins). The possibilities are limitless!
The MIND diet, or Mediterranean-DASH Intervention for Neurodegenerative Delay, is a sort of hybrid between the DASH diet and the Mediterranean diet. It features foods meant to slow the progression or development of Alzheimer’s disease, the most common form of dementia and an incurable neurodegenerative condition that more than 5 million Americans are living with, according to the Alzheimer’s Association. (12) Some research backs up this notion, including a study published in September 2016 in Alzheimer’s Dementia that found a link between following the MIND Diet and a reduced risk of the disease. (13)

The final possible culprit behind stubborn weight issues may be the stress hormone, cortisol. Too much cortisol will increase hunger levels, bringing along subsequent weight gain. The most common cause of elevated cortisol is chronic stress and lack of sleep (see tip #10), or cortisone medication (tip #9). It’s a good idea to try your best to do something about this.
Type of support: Every person has different needs when it comes to what motivates them to succeed. Think about how you have met other important goals, quit bad habits, or motivated yourself to change in the past. Would you be more likely to succeed using social media; in-person meetings with strangers or acquaintances; or expert counseling using text messaging, phone calls or email?

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.
×