why is having some body fat important for health?

Having some body fat is important for health because it serves critical functions such as providing stored energy when food is not available, insulating the body to maintain a constant temperature, and protecting vital organs. Body fat also plays a role in hormone regulation, including hormones that control metabolism, appetite, and reproductive functions. Additionally, fat tissue contributes to immune function and helps regulate inflammation. Without adequate body fat, the immune system can be impaired, and in women, low body fat can reduce estrogen levels leading to bone health problems. Therefore, a healthy amount of body fat supports survival, reproduction, and overall physical and psychological health, while excess or insufficient fat can pose health risks.