Your metabolic response to starch and risk of obesity

Alpha-amylase, an enzyme found in saliva, breaks down starch. Some people are genetically predisposed to produce a lot of alpha-amylase, while others are not—all based on variations in the AMY1 gene. If you have more alpha-amylase, your body will break down starches more efficiently, which means you will be less likely to gain weight or have a high BMI (BMI). A genetic test should be able to tell you whether starches will be harmful to you more than the average person.

Some DNA tests are designed to provide information about how your body processes food and genetic influences such as this one that may affect your metabolism and eating habits. Don't be concerned if a genetic test reveals that you are more likely than the average person to gain weight. You can still lose weight and stay healthy by following some of these science-backed diet plans.