Burns fat: You can drop a lot of weight — and quickly — on the keto diet. Ketones suppress ghrelin — your hunger hormone — and increase cholecystokinin (CCK), which makes you feel full. Reduced appetite means it’s easier to go for longer periods without eating, which encourages your body to dip into its fat stores for energy. Learn more here about the keto diet and weight loss.
The DASH diet is an acronym for Dietary Approaches to Stop Hypertension. As you can probably guess, this eating plan was originally developed to help people lower their blood pressure. But it can do a whole lot more than that: The DASH diet has been shown to reduce bad cholesterol and improve insulin sensitivity. Studies have also suggested that following a DASH diet plan can reduce the risk of serious health issues such as stroke, kidney stones, and diabetes. It's no wonder why so many doctors recommend the DASH diet to their patients and why the plan has been ranked as the "best overall diet" by US News & World Reports for eight years in a row.
Like peanuts, lentils also contain genistein, but their weight loss powers don’t end there. In one four-week Spanish study, researchers found that eating a calorie-restricted diet that also included four weekly servings of legumes aided weight loss more effectively than an equivalent diet sans the pulses. Those who consumed the legume-rich diet also saw improvements in their “bad” LDL cholesterol levels and systolic blood pressure. Next time you’re cooking something starchy for dinner, consider eating fiber and protein-packed lentils instead.
Y. Wady Aude, MD; Arthur S. Agatston, MD; Francisco Lopez-Jimenez, MD, MSc; Eric H. Lieberman, MD; Marie Almon, MS, RD; Melinda Hansen, ARNP; Gerardo Rojas, MD; Gervasio A. Lamas, MD; Charles H. Hennekens, MD, DrPH, “The National Cholesterol Education Program Diet vs a Diet Lower in Carbohydrates and Higher in Protein and Monounsaturated Fat,” Arch Intern Med. 2004;164(19):2141-2146. http://archinte.jamanetwork.com/article.aspx?articleid=217514.
“This is a good example of a study where you should not directly apply the information to what you are eating as an individual,” Stefanski says. “The research is interesting, but the study period examined was only three days. While this study showed insulin resistance, it did not in fact show that the mice had diabetes. Making the leap from the results of this study to a headline that concludes a ketogenic diet will cause type 2 diabetes is not supported.”
Nonetheless, Fung told Live Science that she thinks the study clearly demonstrates the potential for a ketogenic diet to have a detrimental effect in humans. And, until researchers better understand the risks of those detrimental effects, she suggested that people consider other ways of accomplishing their health goals, such as trying a less-restrictive diet.
With this in mind, we’ve put together a list of 40 foods that have been proven to jumpstart weight loss and will help you get to your ideal physique. To jumpstart your weight loss, we’ve selected some nutritious eats, like salsa, that are lower-calorie substitutes for less healthy choices (we’re looking at you, ketchup). And others, such as watermelon, contain certain compounds that have been scientifically proven to reduce the size of your waist and help reduce body fat. Scroll down below for a list of a few dozen weight-loss wonders, and get even more health-conscious inspiration from this list of the 40 Things Healthy Cooks Always Have in Their Kitchen!
Also worth noting is that low-carbohydrate, low-GI, and Mediterranean diets led to significant improvements in blood lipids with up to a 4–10% increase in HDL (4% in the Mediterranean, 5% in low-GI, and 10% in low-carbohydrate diets), 1–4% reduction in LDL (1% in low-carbohydrate, 3% in low-GI, and 4% in Mediterranean diets), and 9% reduction in triglycerides. 
What about fruits and vegetables? All fruits are rich in carbs, but you can have certain fruits (usually berries) in small portions. Vegetables (also rich in carbs) are restricted to leafy greens (such as kale, Swiss chard, spinach), cauliflower, broccoli, Brussels sprouts, asparagus, bell peppers, onions, garlic, mushrooms, cucumber, celery, and summer squashes. A cup of chopped broccoli has about six carbs.
Because people with type 2 diabetes are at an increased risk for cardiovascular disease, there’s a specific concern that the saturated fat in the diet may drive up LDL, or “bad,” cholesterol levels, and further increase the odds of heart problems. If you have type 2 diabetes, talk to your doctor before attempting a ketogenic diet. They may recommend a different weight-loss diet for you, like a reduced-calorie diet, to manage diabetes. Those with epilepsy should also consult their doctor before using this as part of their treatment plan.