Ketosis is the metabolic basis for all “keto” or “ketogenic” diets. On a normal diet that includes carbohydrates (sugar and starchy foods), the body transforms these carbs into glucose, which is used as the body’s main source of energy. But, when we consume a minimum amount of carbs, the body will look elsewhere for that much-needed energy, and that “elsewhere” is fat. In short, when the body goes into ketosis, it is burning fat instead of carbs.
"Your body begins to work differently. This study proves that small amounts of nourishment throughout the day are better than the same amount of food concentrated in three big sittings. If we feed the body at regular intervals we send a signal to the body that it doesn't have to store calories. Conversely, when we skip meals we send just the opposite signal for the body to store calories, creating a negative effect on the metabolism." — Dr. Wayne Scott Andersen, co-founder and Medical Director at Take Shape For Life
To lose 10 pounds fast, Jackson explains you'll then want to cut your calorie consumption by 10%. "For example, if you average 2,000 per week, reduce that amount to 1,800 calories and see if you lose weight. You'll also want to take notice of the percentage breakdown of protein, carbs and fat. Aim for a 'bodybuilder breakdown' which is 40% protein, 40% carbs and 20% fat. You'll begin to drop weight in no time!"
"Whether you have ten pounds to lose or 100, the first thing you should do is create an environment for success." That requires removing all temptation from your kitchen and reorganizing your pantry for weight loss. "Collect all of the processed, sugary and fatty foods from your house, and bring them to a local food bank for donation. Then restock your kitchen with healthy groceries—real, natural, whole foods—like fresh fruits and vegetables, almonds and lean proteins like turkey, chicken, fish and eggs." — Chris Powell, the trainer who has helped hundreds of overweight people lose up to half their body weight on ABC's reality series Extreme Weight Loss

"These diets are so restrictive that of course you're going to lose weight fast because you're not eating enough calories to sustain basic activities of your body, let alone any exercise. That's nothing that any person can sustain for the long term," Hogan said. "The weight's going to come back if you do lose any weight, and then it's going to be harder to lose weight in the future."


Processed, packaged foods are often loaded with more salt, sugar, and refined carbs than you’d put in the foods you cook for yourself. When you’re looking to drop weight fast, avoid foods that come in packages and stick to whole, unprocessed foods. Build your plates with non-starchy veggies, unprocessed whole grains, lean proteins, and healthy fats, and season with spices, not salt.
When we began our research on Nutrisystem, the first thing that stood out to us was the variety of  plans they offer. In total, there are nine different options, including plans for diabetics, vegetarians, and even special diets for men (a rarity in the diet industry). Also, most of their plans are highly customizable, so if you don’t like their recommendations you can customize your meal plan from chef-created menu items including staples like chicken masala, cheesesteak pizza, muffins, burgers, popcorn, and lots more.
"When clients come to me, many of them have been through the diet wringer. They've tried every fad and gimmick and, of course, they've failed to maintain long-term success. The key to losing 10 pounds and weight loss, in general, is to never feel like you're on a diet, because diets don't work. If you feel deprived, you will never make it past a few weeks. The only way to achieve long-term weight loss is to learn to appreciate food as fuel and slowly replaced processed food that cannot properly energize the body with real food that can. After a while this will become second nature and won't feel like a daily struggle." — Laura Burak, MS, RD, CDN
Research also finds that drinking frequently—even if it’s a moderate amount—can set you up for excess pudge. Not only do the beverages themselves contain unnecessary calories, but once you start sipping too much, your inhibition also plummets, according to one 2016 study. The result? You’ll have a hard time resisting that late-night slice of pizza. So if you're going to imbibe, be sure to stick to one drink per day for women and up to two drinks for men.
If you like eating meat and want to lose weight, you might be tempted to try this recent extreme diet fad that proponents have made some pretty outrageous claims about. One: that eating nothing but meat can cure you of autoimmune diseases. The problem is that there’s no good research to support that notion, or any other health claim, for that matter. Indeed, omitting foods known to be good for you — fruits and veggies among them — can lead to a bunch of unwanted side effects, including constipation and potentially dangerous nutrient deficiencies. Still, since you’re cutting out so many food groups, there’s a decent chance you’ll lose weight, experts say. Regardless of any possible benefits you might see, this restrictive approach is definitely one you’ll want to ask your doc about before you even consider diving in.

If you’ve been eating fast food for years, get real about your approach: You’re probably not going to stick to an organic, gluten-free, paleo overhaul for very long. "You want to change as little as possible to create calorie deficit," says Dr. Seltzer, who insists the best way to support sustainable weight loss is to incorporate small changes into existing habits. So instead of giving up your daily BLT bagels in favor of an egg-white wrap, try ordering your sandwich on a lighter English muffin. Or say you eat a snack bar every afternoon: Swap your 300-calorie bar for a 150-calorie alternative. "Your brain will feel the same way about it, so you won’t feel deprived," he says.

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