I love this study because it examined a realistic lifestyle change rather than just a fad diet. Both groups, after all, were labeled as healthy diets, and they were, because study investigators encouraged eating high-quality, nutritious whole foods, unlimited vegetables, and avoiding flours, sugars, bad fats, and processed foods. Everyone was encouraged to be physically active at a level most Americans are not. And — this is a big one — everyone had access to basic behavioral counseling aimed at reducing emotional eating.
People with chronically high levels of the stress hormone cortisol tend to carry excess visceral fat. Foods that are high on the glycemic index (GI), which uses a ranking system of 0 to 100, cause more rapid spikes in your blood sugar, in turn triggering the release of cortisol when glucose levels crash. The constant up and down of your blood sugar levels can also lead to insulin resistance — the first step on the road to type 2 diabetes. To help keep cortisol levels stable, choose low-GI foods (with a rating of 55 or less) like beans, lentils, and chickpeas, instead of high-GI options like white rice and potatoes. To find the GI rating of your foods, use the University of Sydney’s database at glycemicindex.com.
Not much of a coffee drinker? Tea is also a natural diuretic, and types of herbal tea such as dandelion or fennel root can also lend a hand. In fact: When a recent study compared the metabolic effect of green tea (in extract) with that of a placebo, researchers found that the green-tea drinkers burned about 70 additional calories in a 24-hour period.
Rather than training hungry, drink a protein shake before you go. One scoop, or about 20 grams, is sufficient. Whey is a great choice because it's easy on the stomach, quickly absorbed, and has an enormous list of additional benefits. Numerous studies have shown that ingesting more high-quality protein leads to both increases in muscle mass and decreases in fat mass.
Get all that? Basically, the differences between groups were minimal. Yes, the low-fat group dropped their daily fat intake and the low-carb group dropped their daily carb intake. But both groups ended up taking in 500 to 600 calories less per day than they had before, and both lost the same average amount of weight (12 pounds) over the course of a year. Those genetic and physical makeups didn’t result in any differences either. The only measure that was different was that the LDL (low density lipoprotein) was significantly lower in the low-fat group, and the HDL (high density lipoprotein) was significantly higher in the low-carb group.
In a nutshell: the plan uses 6 days of ketosis – when your body burns fats for energy – followed by 1 day of carbohydrate loading along with constant toxin binding supplements to help your body get rid of the released toxins. This protocol isn’t low-calorie, and you don’t run the same risk of causing metabolic problems that you do when you follow a low-calorie diet.
The Volumetrics Diet (Est. $10), based upon the well-regarded book "The Ultimate Volumetrics Diet: Smart, Simple, Science-Based Strategies for Losing Weight and Keeping It Off" is a sensible, sustainable approach that draws rave reviews from experts and dieters. You swap high-density foods, which tend to have more calories, for lower-density foods like fruits, vegetables, soups and stews. This swap of foods with more bulk but fewer calories helps fill you up, thus eliminating one big problem with dieting: hunger. It's a top pick in most of our expert roundups, and its author, Barbara Rolls, is a leading researcher in the field of nutrition. Many other diets, most notably Jenny Craig (Est. $20 and up per month, plus food) (covered in our discussion of the best prepackaged diet plans) and Weight Watchers, have adopted, at least in part, the Volumetrics approach to meal planning to help keep hunger at bay.
One advantage of a commercial weight loss program is that you mitigate your risk of side effects when compared with a diet cobbled together yourself. There’s a lot that can go wrong in a diet; if you restrict your food intake too severely, you’ll be missing out on vital micronutrients or your macronutrient balance can get thrown off. In contrast, if you are too lax, you won’t end up losing much weight.