Here are 6 simple ways to lose belly fat that are supported by science. Athletepharm Keto Piils If you're not sure if a food is healthy or unhealthy, read the label. However, watch out for the different names for sugar and misleading health claims. You should be especially careful when selecting "low-fat" or "fat-free" foods, as manufacturers often add lots of sugar to make up for the flavor that's lost when the fat is removed. Liquid sugar calories don't make you feel full, and you won't eat less food to compensate.