Without peer-reviewed clinical trials, many of the benefits remain anecdotal. For instance, Weiss himself has been on a low-carb high-fat (though not strictly ketogenic) diet for more than six months, and claims he does feel much better. But he’s clear about what he knows and what he doesn’t. He’s lost weight and his borderline pre-diabetes is gone.
Diets to promote weight loss can be categorized as: low-fat, low-carbohydrate, low-calorie, very low calorie and more recently flexible dieting. A meta-analysis of six randomized controlled trials found no difference between low-calorie, low-carbohydrate, and low-fat diets, with a 2–4 kilogram weight loss over 12–18 months in all studies. At two years, all calorie-reduced diet types cause equal weight loss irrespective of the macronutrients emphasized. In general, the most effective diet is any which reduces calorie consumption.
Dinner on day 2 is also heavy on meat, this time in the form of hot dogs, which are a source of protein and fat. You’ll also get Vitamin B-6, Vitamin B-2, iron, calcium and sodium from the hot dogs. The broccoli, carrots and banana are where you’ll get lots more vitamins and minerals- including all the Vitamin C and A that you need for the day. In addition, they contain potassium, iron, calcium, fiber and Vitamin B-6. Don’t forget your ice cream!
The popular low-carb diets (such as Atkins or Paleo) modify a true keto diet. But they come with the same risks if you overdo it on fats and proteins and lay off the carbs. So why do people follow the diets? "They're everywhere, and people hear anecdotally that they work," McManus says. Theories about short-term low-carb diet success include lower appetite because fat burns slower than carbs. "But again, we don't know about the long term," she says. "And eating a restrictive diet, no matter what the plan, is difficult to sustain. Once you resume a normal diet, the weight will likely return."
Boredom is dangerous and so easily leads to weight gain. While free time gets perceived as relaxing, it actually makes me feel anxious, which can lead to bad eating habits. My busiest days are the ones when I tend to focus less on my food and more on what I need to get done. That's why I always try to fill my schedule with things that make me feel productive—so I don’t find myself rummaging through the pantry for a lack of something to do.