Scientists are finding that taking anti-aging medicines or treatments your whole life might not be needed and could even be bad for you, especially if you start when you're young. Instead, it might be better to wait until you're older and use these treatments for shorter periods.

This study tests whether giving rapamycin (an anti-aging drug) only at later stages of life or for short periods works just as well as giving it throughout life. The results support the idea that we might not need to take anti-aging drugs forever - taking them later in life might be enough.