Here's a little-known secret: You're not just born with great skin. Having a flawless complexion has more to do with how you treat your skin than having good genes. So why don't more of us have glowing complexions? It's simple: We believe skincare myths that prevent us from really getting the gorgeous skin we want. Well, not anymore. With the help of dermatologists Katie Rodan, MD, and Kathy Fields, MD, creators of Proactiv Solution and the Rodan + Fields skincare lines, we've busted the top 10 things women incorrectly believe about their skin. Read on for the real scoop on your skin:

The reality: Sure, genetics play a role in how your skin looks, from the size of your pores to its texture and color. But banking on aging like your mom or grandmother is a big mistake. "Habits make more of a difference than genetics," explains Dr. Rodan. "The biggest culprit in aging is sun exposure, and your drinking, smoking, stress, and sleep habits play a role, too." Skipping sunscreen, imbibing too often, coping ineffectively with stress, and sleeping on your side or stomach can all exacerbate and create wrinkles, adult acne, and texture changes.

The reality: There are two types of damaging sun rays: UVA, which are responsible for aging the skin; and UVB, which are responsible for burning it. The SPF number on a bottle of sunscreen only gives a guide for how much UVB protection the product offers. It doesn't tell you whether or not the product protects from UVA rays (which are also responsible for melanoma). All sunscreens protect from UVB rays, explain Drs. Rodan and Fields. To fully protect yourself, however, look for a product that contains UVA-blocking ingredients, too, such as zinc or avobenzone (Parsol 1789), and reapply often.

The reality: "Sunscreens already add moisture to your skin because of their ingredients," says Dr. Fields. So if you have oily skin, you may want to skip the separate moisturizer. For those who prefer to wear both products, apply the moisturizer first; allow to dry, then apply the sunscreen. Either way, be sure to wear sunscreen daily: "Every day is sun day," says Dr. Fields, even if it's cloudy or overcast.

The reality: "Recent studies have shown that by age 18, you've only accumulated 18 to 23 percent of the sun damage you'll incur over a lifetime," says Dr. Rodan. That means that there's still time to protect your skin from the sun and put off sun-induced aging. Do this by using sunscreen and products with sun-damage reversing ingredients such as vitamin C and retinol.

The reality: There's no such thing as a miracle in a bottle. "As you age, your facial bones shrink, you lose fat under the skin, and your skin begins to become loose," says Dr. Fields. "Rubbing on a cream isn't going to address these things." What's more, cosmetic skincare products cannot, by FDA law, include medications, which are the only things that truly change the structure of the skin. What cosmetic creams can do: Temporarily plump up and hydrate your skin. For the best chance at turning back time, see your dermatologist for medications or procedures.