Before you head out to dinner, pour yourself a cup of green tea. The active ingredient in green tea, EGCG, boosts levels of cholecystokinin, or CCK, a hunger-quelling hormone. In a Swedish study that looked at green tea’s effect on hunger, researchers divided up participants into two groups: One group sipped water with their meal and the other group drank green tea. Not only did tea-sippers report less of a desire to eat their favorite foods (even two hours after sipping the brew), they found those foods to be less satisfying.

Kamut is an ancient grain native to the Middle East that is an excellent source of heart-healthy omega-3 fatty acids, protein, and fiber, while simultaneously being low in calories. In fact, a half-cup serving of the stuff has 30 percent more protein than regular wheat and just 140 calories. What’s more? A study published in the European Journal of Clinical Nutrition found that eating Kamut reduces cholesterol, blood sugar, and cytokines (which cause inflammation throughout the body). Kamut’s ability to stabilize blood sugar and reduce inflammation make it a great weight loss staple, especially if it is used in place of nutritionally lacking refined grains.


A great source of calcium and important cancer-fighting compounds, broccoli also has loads of filling fiber and will set you back only 30 calories per serving. If eating this cruciferous veggie makes you bloat, try steaming it first, which makes it easier to digest while still preserving the cancer-fighting ingredients that could be lost when you boil or cook it in the microwave.
Drinking enough water can help you stay slim, too. Research from the American Chemical Society in Boston found that having two 8-ounce glasses of water before a meal while also reducing portion sizes could help you lose weight and keep it off. Not to mention, water fills you up, curbing your appetite: "In addition to slightly boosting your metabolism, drinking water before meals has been shown to help you eat less without trying," says Sass.
Abazarfard, Z., Salehi, M., & Keshavarzi, S. (2014, May). The effect of almonds on anthropometric measurements and lipid profile in overweight and obese females in a weight reduction program: A randomized controlled clinical trial. Journal of Research in Medical Sciences: The Official Journal of Isfahan University of Medical Sciences, 19(5), 457–464. Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116579/
Set (and write down) reasonable expectations for what you plan to achieve during your challenge. “You can absolutely make a difference in 10 days,” says Brooke Alpert, RD, a dietitian in New York City and the author of The Diet Detox, but don’t expect to shed 20 pounds a la The Biggest Loser. “While actual weight loss will be around three to four pounds, you can really notice the difference in the way your body feels in about a week.”
It’s just as important and beneficial (if not more so) to focus on diet quality rather than quantity, says a 2018 study published in the Journal of the American Medical Association. Focus on real foods rather than a strict number of calories and you’re more likely to stay slim over the long term. Shapiro recommends these shedding superfoods, in particular:

Spirulina is a high-protein seaweed supplement that’s typically dried and sold in powdered form. The dried stuff is about 60 percent protein, and, like quinoa, it’s a complete protein, meaning it can be converted directly into muscle in the body and is thus a great weight loss tool. A tablespoon of the blue-green algae delivers 8 grams of metabolism-boosting protein for just 43 calories, plus half a day’s allotment of vitamin B12, which in and of itself can give you more energy and boost your metabolism. Try tossing some spirulina into a smoothie and watching the pounds melt off. For more skinny smoothie ideas, check out this list of 56 Smoothies for Weight Loss!
A simple way to slim down: Eat the rough stuff. Simply adding more fiber to your diet can lead to weight loss. That’s because your body can’t break down fiber, so it slows down digestion and takes up space in your stomach. With 4 grams of fiber per cup, oatmeal can be a good source. Walnuts can add about another 2 grams, plus satisfying protein and crunch.
Grains get a bad rap when it comes to weight loss, but that's because refined grains (read: processed foods!) are linked to wider waists. 100% whole grains are bloat-busting superstars, however, as they're packed with minerals and de-puff by counter-balancing salt. Stick to brown rice, quinoa, wheat, barley, millet, farro, sorghum, and amaranth for the biggest benefits.
“Research published in the Journal of Nutrition in 2006 found that the type of DHA omega-3 oil found in salmon may have an ‘anti-obesity effect’ by preventing an increase in fat cells, causing death of pre-fat cells, and promoting the breakdown of fat in the body,” says Maleeff. Not sure how to prepare it? Try any (or all) of these five tasty salmon recipes.

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)
Unlike traditional green tea, matcha preparation involves covering the tea plants with shade cloths before they’re harvested. This triggers the growth of leaves with better flavor and texture, which are hand selected, steamed briefly to stop fermentation, then dried and aged in cold storage, which deepens the flavor. The dried leaves are then stone-ground into a fine powder.
Kefir is a yogurt-like substance, but it actually contains less sugar and more protein than conventional yogurt while remaining packed with gut-friendly probiotics that can help you lose weight by aiding digestion. In one study, kefir displayed weight loss properties similar to those of milk and other dairy-rich products. Other probiotic-rich foods include kombucha, bone broth, and fermented items such as sauerkraut and kimchi.
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