You know you're supposed to eat more protein to lose weight, but you might not know exactly why. Well, it actually has to do with how your body handles insulin. "Your body starts to produce more insulin as you age, since your muscle and fat cells aren't responding to it properly," explains Louis Aronne, M.D., director of the obesity clinic at Cornell University.
Saturated fats in food will pack on more visceral fat than polyunsaturated ones, according to a 2014 Swedish study. When subjects ate 750 more calories daily for seven weeks, either in the form of palm oil (saturated) or sunflower oil (polyunsaturated), the former gained more visceral fat while the latter gained more muscle mass and less body fat. The study authors believe different fat types can impact both the way your body forms fat and stores it. What’s more, including healthy fats in your meals can make them more satiating and keeps hunger at bay.
“Belly fat or abdominal fat is the subcutaneous (which means under the skin) fat that sits around the waist and provides a store of energy, and also protection and heat, for the organs,” says Tarik Belalij, personal trainer and nutritionist at Everyone Active Becontree Leisure Centre. “Small amounts of fat below the skin is normal and healthy, it is the visceral fat, which surrounds the organs that can be the most dangerous type of fat – leading to heart attacks and diabetes.”