Created in 2003 by cardiologist Arthur Agatston, this low-carb diet features three phases. The first phase is the most restrictive, limiting carbs such as potatoes and rice. Each subsequent phase becomes more lenient, and the diet emphasizes lean protein, unsaturated fats, and low-glycemic carbs such as nonstarchy vegetables. South Beach promotes lasting lifestyle changes, according to the Mayo Clinic. (21)


When you substitute foods, make sure you don’t use the same amount of the substitute as the original without checking caloric equivalence first. For example, if you want to substitute Greek yogurt for cottage cheese, you can actually eat a bit more of the yogurt than the prescribed amount of cottage cheese. Just 1 cup of 2% cottage cheese contains 194 calories, while 1 cup of 2% Greek yogurt contains 150 calories, meaning you can have additional 1/3 cup of the yogurt. Make use of a calorie calculator if you’re not sure about your allowances.   

Sure, you can take a multivitamin while you’re on the diet. That said, you should really only be taking a multivitamin if you struggle to eat a varied diet with plenty of fruits and vegetables. The multivitamin will ensure that you’re not missing out on any minerals and vitamins that you’re not getting from your diet. Make sure that supplements and vitamins are approved by your doctor before you take them.
Arteries (are-te-rease): The blood vessels that carry oxygen-rich blood away from your heart for delivery to every part of your body. Arteries look like thin tubes or hoses. The walls are made of a tough outer layer, a middle layer of muscle and a smooth inner wall that helps blood flow easily. The muscle layer expands and contracts to help blood move.

If your fitness goals include a flatter belly and stronger core, you're going to need a solid plan, expert guidance, and a little outside motivation. Our 30 Days to a Flat Belly plan has all three! This comprehensive workout plan will give you results you want without a pricey gym membership; you can do these workouts anywhere — and they're all 30 minutes or less.
Erin Palinski-Wade, RD, CDE, and author of 2 Day Diabetes Diet and Belly Fat Diet For Dummies, feels similarly concerned. "A restrictive diet that does not promote the nutritional value of foods and is only focused on calories, such as the Military Diet, may promote weight loss at the expense of health," she says. "This diet is not sustainable and any weight loss will most likely be regained quickly." She even cautions that the diet may ultimately lead to weight gain down the road. "A drastic reduction in calories will promote weight loss, however restricting calories this low may promote a loss of both lean body mass (muscle mass) as well as fat mass, which makes it easier to regain the weight as soon as you return to normal eating habits."
When you are on a carbohydrate-rich diet, your body can store up to 1600-2000 calories worth of energy in muscles, blood and in the liver. Once these are depleted, you are out of fast energy sources. Now, when you are running on the keto diet, you are fueled by ketone bodies. This means you are using fat as the main energy source. And you don’t run low on blood glucose.
HCG, or Human Chorionic Gonadotropin, is a hormone produced during pregnancy by the placenta after implantation, and doctors sometimes prescribe it for fertility issues. But this hormone has also gained popularity as a weight-loss supplement — and using it as such can be dangerous. In fact, the U.S. Food and Drug Administration (FDA) warns against purchasing over-the-counter hCG, as these supplement products are illegal. (34)

It usually takes three to four days for your body to go into ketosis because you have to use up your body's stores of glucose, i.e., sugar first, Keatley says. Any major diet change can give you some, uh, issues, and Keatley says he often sees patients who complain of IBS-like symptoms and feeling wiped out at the beginning of the diet. (The tiredness happens because you have less access to carbs, which give you quick energy, he explains.)
This was a very hard one for me because I'm a frugal and waste-conscious person. I hold on to things for far longer than I should and always try to either recycle or donate whatever I don’t use anymore. This can be difficult when it comes to having leftover food that I probably shouldn't eat three days in a row (I'm looking at you, pizza.) I use the phrase “better in the trash than in my body” anytime I am in that situation to help me realize that if I eat my daughter's picked-at leftovers, for example, they're still not going anywhere in need.
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