People aren’t exactly born “naturally fat”. Genetics does play an important part in weight, though. People with certain genes are more likely to overeat and be less active and may have a harder time maintaining a healthy weight than others. However, genetics is only a small part of the reason. Your weight has much more to do with what you eat and how much exercise you get. No matter what, everyone needs to eat nutritious foods to stay active, keep their body strong and healthy, and maintain a healthy weight.