The HMR Program uses meal replacements – think low-calorie shakes, meals, nutrition bars and hot cereal – in phases, coaching from experts, physical activity and an emphasis on fruits and vegetables to help dieters shed pounds fast. While last year the diet shared the No. 1 ranking in this category with the Biggest Loser diet, this year it has the top spot to itself. "This diet makes it easy to lose weight fast and would likely be effective for someone who wants to lose weight for a specific event," one expert said. "However, as far as long-term healthy-habit-forming, this diet falls short" in part because dieters don't learn to make their own healthy food choices.
Visceral fat, commonly known as belly fat, is the layer of fat below the muscles of your abdomen. Due to its crucial location surrounding many of your vital organs, belly fat supplies a constant source of energy but also exposes the body to harmful toxins and hormones. When you have too many fat cells or your fat cells get too large, they can overproduce toxins that increase your risk for chronic inflammation, diabetes, heart disease and cancer. This is why belly fat can be more dangerous than subcutaneous fat—or the outer layer of fat that you can pinch with your fingers. That said, the reason you're having trouble buttoning your pants may not be visceral fat: what we're calling "belly fat" these days could be bloating or water retention rather than a fat buildup. Read on for steps you can take to beat the bulge.