This popular diet program is fairly restrictive — and for the first 30 days, dieters must cut out grains, legumes, most dairy, added sugar, and alcohol without any slip-ups, according to the Whole30 website. (29) The aim is to “reset” your body and to adopt dietary habits resulting in weight loss. Cutting out added sugar and alcohol has merit, but all the restrictions prove challenging and could lead to nutrient deficiencies and disordered eating.
"There are many foods that aid weight loss, but one that I often recommend to my clients and eat myself is grapefruit. Researchers at Scripps Clinic in San Diego found that when obese people ate half a grapefruit before each meal, they dropped an average of 3.5 pounds over 12 weeks. Apparently, the tangy fruit can lower insulin, a fat-storage hormone, and that can lead to weight loss. Plus, since it's at least 90% water, it can fill you up so you eat less. However, if you are on certain medications you should not have grapefruit or grapefruit juice, so check the label on all your prescriptions, or ask your pharmacist or doctor." — Patricia Bannan, MS, RDN, author of Eat Right When Time is Tight.
"If I had to pick one food for weight loss, I would choose oatmeal. It's a whole grain, high-fiber carbohydrate that sticks to your ribs, so it keeps you full and satisfied. Eating it also leads to a slow rise in blood sugar, which has been shown to keep insulin levels from spiking, leading to less fat storage. The key with oatmeal is how to make it so it's not a calorie bomb. I recommend making it with nonfat milk in place of water, stirring in chopped raw nuts or natural nut butter, and topping with fresh or frozen fruits. If you need some added sweetness, a drizzle of maple syrup should do it. — Jessica Fishman Levinson, MS, RDN, CDN, culinary-nutrition consultant and founder of Nutritioulicious
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.)