There’s certainly a huge difference in the UV levels between winters and summers. Even during winters, if you go out while the UV index isn’t 0, you should wear sunscreen if you’re on tretinoin. (I’m deferring to a dermatologist and haven’t actually checked the sources though.)
There’s certainly a huge difference in the UV levels between winters and summers. Even during winters, if you go out while the UV index isn’t 0, you should wear sunscreen if you’re on tretinoin. (I’m deferring to a dermatologist and haven’t actually checked the sources though.)