It's not all doom and gloom, though. Prevention (aka taking care of yourself) is one of the best things you can do for longevity. That means doing things like eating well,

staying active, getting enough sleep, managing your stress… all those good lifestyle habits. They're easier said than done, I know, but if you make a few changes now, the results can really pay off.

When it comes to skin health, there are a few products to keep on hand and habits to take up to target those changes you might be noticing. "Even if you have taken good care of your skin, you may begin to notice subtle signs of aging in your 30s," explains Joyce Imahiyerobo-Ip, MD, FAAD, owner of Vibrant Dermatology and SkinBar MD. "This includes fine lines and wrinkles, as well as hyperpigmented sun spots and melasma that give you a mottled, uneven complexion."

In your 30s, you're also combatting the loss of collagen, which can present as wrinkles and lines. And there's one surprise skin condition that might throw you for a loop: acne. Board-certified dermatologist and founder of Skin Wellness DermatologyCorey L. Hartman, MD, FAAD, says many women might start to experience acne, even if they didn't have it during their teenage years.