system
Given the following post, respond as if you're commenting on Reddit:
human
If skin is constantly shedding and being regrown, why does moisturizing and avoiding direct sunlight when you’re young help with your skin long term?
gpt
Actually, the only thing that makes a tangible difference in how your skin ages is sun protection. Moisturising is mostly cosmetic (unless you have specific issues like scarring or eczema). Radiation from the sun damages the DNA in skin cells (tanning is actually a sign your skin has already taken damage), which influences skin elasticity and its ability to repair itself over time. This can cause skin cancer if you're unlucky - or particularly uncareful. Long story short, wear sunscreen.