Popularized by the documentary Forks Over Knives, the Ornish diet is a low-fat, plant-based diet plan based on whole grains, vegetables, fruits, and legumes. It's based on a lacto-ovo style of vegetarianism, allowing only egg whites and nonfat dairy products. It's packed with vitamins, fiber, and lots of filling plants to keep you satiated. Some studies have shown it can reverse heart disease and have beneficial effects on other chronic health conditions. (BTW, there is a difference between a vegan diet and a plant-based diet.)

"Whether it's an app or paper food logs, tracking what you eat will certainly be eye-opening. Almost everyone consumes more than they think. Write everything down as soon as you're done eating so you don't forget anything. The simple act of recording what you eat will make you eat less. When the calories are in your face, it makes you think twice!" — Martha McKittrick, RD, CDE

In other words? "Drinking makes you more likely to eat sh*t," Dr. Seltzer says, referring to drunk foods. At the same time, he stops short of asking patients to quit alcohol cold-turkey to lose weight. Plus, research suggests you don’t have to, as long as your intake is moderate—i.e., less than about a drink a day. "If you drink a glass of wine every night and notice you eat more afterward, eat less early to account for this," he says. "Or, if you’re drinking four glasses of wine a week, drink three instead so you’ll won’t feel such a big difference."


A relatively new offering, the Nutritarian diet is based on maximizing the amount of healthy vitamins, minerals, and trace nutrients in your food, balancing your hormones, and avoiding toxins. The plan—created by Joel Fuhrman, M.D., author of The End of Dieting—is nutrient-dense, plant-rich, and includes anti-cancer superfoods to help you not just lose weight but live a long, disease-free life. (P.S. Follow these guidelines to make sure you're absorbing all the nutrients from your food.)

A 2015 study from the Annals of Internal Medicine showed that for those who have a hard time following a strict diet, simplifying the weight loss approach by just increasing fiber intake can still lead to weight loss. Women should aim for at least 25 grams of fiber per day (based on a 2,000-calorie) diet, according to the most recent U.S. Dietary Guidelines. Start with our high-fiber diet plan.
"Don't buy low-fat dairy products. They're usually loaded with sugar. Besides, an American Journal of Clinical Nutrition study found that the more high-fat dairy products a person ate, they lower their risk of diabetes; the more low-fat dairy products, the higher their risk. — Mark Langowski, celebrity trainer and author of Eat This, Not That! for Abs
"The best thing you can do for your belly is to give up processed foods. A study in the journal Food & Nutrition Research found that our bodies burn only 50 percent as many calories digesting processed foods as they do real foods. So it's like eating twice as much, even if the calories are the same!" — Mark Langowski, celebrity trainer, CEO and Founder of Body By Mark 
"Even though a smart diet is key, exercise can help boost your body's metabolism to shed fat. Through health care providers often recommend brisk walking or jogging, these exercises may not help you see the results you want. Instead, try interval training," shares Dr. Sean M. Wells, DPT, PT, OCS, ATC/L, CSCS Owner and PT, Naples Personal Training, LLC

"Eat vegetables before or with meals. Whether you are hungry on your way home or right when you walk in the door, snacking on veggies can help you keep your portions in check once you sit down to a meal. I also recommend starting your dinner with a vegetable salad or vegetable soup to fill you up and prevent overeating. — Ilyse Schapiro, MS, RD, CDN, author of Should I Scoop Out My Bagel?
After a free diet analysis based on your Body Mass Index and submitting your ideal weight, Nutrisystem will recommend a plan to help you reach your goal. This plan is designed by nutritionists and allows for six meals a day (4 of them delivered by Nutrisystem and 2 to be prepared by you, following Nutrisystem’s guidance and recipes). This way you won’t be hungry for long, making it easier to stick to the diet plan until its completion.
"Anytime you’re stressed, you probably go for food," Dr. Seltzer says. (Have we met?!) That’s because cortisol, the stress hormone, stokes your appetite for sugary, fatty foods. No wonder it’s associated with higher body weight, according to a 2007 Obesity study that quantified chronic stress exposure by looking at cortisol concentrations in more than 2,000 adults’ hair.
Face it, if you want to lose weight over the long haul, your best bet is to make sustainable, long-term lifestyle changes.But sometimes life comes at you fast and you need a fast solution. One smart lifestyle change is to eat plenty of veggies—especially for someone looking to lose weight. Vegetables are nutrient-packed and provide plenty of filling fiber with hardly any calories. Plus, non-starchy veggies have a high water content, so they hydrate you while filling you up—the perfect combination for weight loss. Shedding those pounds means shedding old habits, check out the nine simple changes this woman made to lose 45 pounds and keep them off.
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.
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.
Getting enough protein every day, whether you’re in a quick-fix or long-term mindset is important for keeping your muscles and metabolism healthy throughout weight loss. Make sure you’re having some chicken breast, lean ground turkey, fish, seafood or tempeh that’s the size of a deck of cards at every meal. When snacking, have 2 eggs, 1/4 cup of nuts, or 3/4 cup of Greek yogurt or cottage cheese to meet your protein needs and stay full and feel slim.
To lose 10 pounds fast, Jackson explains you'll then want to cut your calorie consumption by 10%. "For example, if you average 2,000 per week, reduce that amount to 1,800 calories and see if you lose weight. You'll also want to take notice of the percentage breakdown of protein, carbs and fat. Aim for a 'bodybuilder breakdown' which is 40% protein, 40% carbs and 20% fat. You'll begin to drop weight in no time!"
"Your body begins to work differently. This study proves that small amounts of nourishment throughout the day are better than the same amount of food concentrated in three big sittings. If we feed the body at regular intervals we send a signal to the body that it doesn't have to store calories. Conversely, when we skip meals we send just the opposite signal for the body to store calories, creating a negative effect on the metabolism." — Dr. Wayne Scott Andersen, co-founder and Medical Director at Take Shape For Life
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