As we age, fat tends to move into more dangerous areas of the body, increasing health risks. A new study shows that testosterone therapy may help stop this shift—protecting older women from harmful visceral fat after injury. Credit: Shutterstock As people get older, both the amount of fat in the body and where it is stored begin to shift. Most body fat is subcutaneous, meaning it sits just beneath the skin. This type of fat is generally not harmful and is actually necessary for overall health.