Making people look too young

We witness that some people look much younger than their real age. It's really hard to understand what the wisdom of this is. For example, there are people who are 35 years old and look 25 years old. Is this genetic or is it because they do not pay attention to their mental and physical health.

I think it's important for them to take care of their health. Genetics matters. When the two come together, people start to look younger.