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.)
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!
If you're not a fan of meat, you may do better on a weight-loss program that emphasizes fruits and vegetables. A 2012 study published in The Journal of the Academy of Nutrition and Dietetics found women over 50 were more successful at keeping the weight off when they followed diets that increased their intake of fruits and vegetables and ate less meat and cheese. Good weight-loss programs with an emphasis on fruits and vegetables that might help women over 50 lose weight include the DASH diet, the Mediterranean diet and the Mayo Clinic diet.
The MIND—a mix of DASH and the Mediterranean diet—is supposed to help protect the brain and prevent Alzheimer’s disease, though much more research is needed to determine whether it really helps curb brain decline. People are encouraged to eat from 10 brain-healthy food groups: green leafy vegetables, all other vegetables, nuts, berries, beans, whole grains, fish, poultry, olive oil and wine. They are also told to avoid foods from five food groups: red meats, butter and stick margarine, cheese, sweets and fried or fast food.
People who get enough sleep tend to weigh less than those who don't. Additionally, researchers found that well-rested dieters lost more fat than those who were sleep deprived, who lost more muscle. "Whenever I don't sleep enough, I'm ravenous the next day," says Weil. To keep her hunger in check and help her maintain her slim figure, she tries to get at least 8 hours of sleep every night.

“For some people, it’s knowing, ‘Typically I eat a whole sandwich,’” says Gagliardi. “‘Now, I’m going to make the decision to eat half a sandwich at lunch and save the other half for my dinner and essentially cut my calories in half. And they feel good about that. They’re not having to do math.” To get started, check out these 25 simple ways to cut 500 calories a day.

There’s a large spectrum of where people can fall on a vegetarian diet: For example, vegans consume no animal products, whereas ovo-lacto vegetarians eat both dairy and eggs. The eating style may help with weight loss, suggests a review published in August 2017 in Nutrients, but some vegans and vegetarians may become deficient in specific nutrients, such as calcium, iron, zinc, and vitamin B12, according to an article published in December 2017 in Nutrition, Metabolism and Cardiovascular Diseases. (23,24)
It’s called a “beer belly” for a reason. Boozy bubbles are a major cause of belly bloat, as anyone who’s ever looked in the mirror after a few too many drinks can attest. But it’s not just the carbonation that is the culprit. Alcohol can lead to an overgrowth of bad bacteria in your stomach, leading to gas, not to mention all the empty calories that are going straight to your waistline. Instead, skip the alcohol altogether or limit yourself to one serving per day.
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Consequently, researchers have widely discredited the hCG diet, which involves using hCG injections, pellets, sprays, or drops, and consuming  as few as 500 calories daily. The diet is problematic not only because there’s a lack of research on hCG supplements, but also because the calorie requirement is dangerously low, potentially leading to nutrient deficiencies, fatigue, hormone imbalances, blood clots, and other issues. Thus, most experts agree the hCG diet is not safe for anyone, the Mayo Clinic notes. (35)
You know the kind, says Jillian: "Everyone's like: 'Give up carbs!' 'Give up fat!' 'Wait, no, now I'm taking pills!' None of them are manageable long-term—and they wreak havoc with your metabolism! Because you're either starving yourself or you're cutting out a major food group. Then you go back into weight-gain mode, but it's even worse, because your body has adjusted to all that crazy fad crap."

So it’s no wonder that losing weight and getting in shape are among the most popular resolutions year over year, because so many people can’t keep them; 80% of New Year’s resolutions fail by February. So Moneyish spoke with several leaders in the field of obesity research and prevention who have reviewed the science surrounding weight gain and loss to explain what to eat and avoid; how much exercise you need and which workouts work best; as well as their tips for making these moves a part of your new, well-balanced life in the New Year.

Luckily, that doesn’t mean you need to dedicate even more time exercising. In fact, high-intensity interval training (HIIT) workouts can slash the time commitment while boosting results. HIIT workouts last about 20 minutes and combine bursts of super-intense exercise with slower recovery phases. This type of workout has been found to help people lose more fat once the workout is over, even though they burn less calories during the workout (since workouts are shorter) and also build muscle, rather than break it down the way conventional cardio does. (3)
One review found that people who sleep between 3.5 and 5.5 hours a night consume nearly 385 more calories the next day when compared to those who sleep between 7 and 10 hours. (6) Sleep is critical for our bodies to repair and function properly. When you consistently don’t get enough sleep, not only are you more likely to gain weight, but you’re also at a higher risk for chronic diseases, anxiety, irritability and more.
Consequently, researchers have widely discredited the hCG diet, which involves using hCG injections, pellets, sprays, or drops, and consuming  as few as 500 calories daily. The diet is problematic not only because there’s a lack of research on hCG supplements, but also because the calorie requirement is dangerously low, potentially leading to nutrient deficiencies, fatigue, hormone imbalances, blood clots, and other issues. Thus, most experts agree the hCG diet is not safe for anyone, the Mayo Clinic notes. (35)

Close the Kitchen at Night. Establish a time when you will stop eating so you won't give in to the late-night munchies or mindless snacking while watching television. "Have a cup of tea, suck on a piece of hard candy or enjoy a small bowl of light ice cream or frozen yogurt if you want something sweet after dinner, but then brush your teeth so you will be less likely to eat or drink anything else," suggests Elaine Magee, MPH, RD, WebMD's "Recipe Doctor" and the author of Comfort Food Makeovers.

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