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We know that the best way to protect your skin is to use sunscreen, but what other products really work? Here are some options backed by science and recommended by doctors.

Tara Weng is always looking for the next big thing in skin care.

I go for products that say 'repair sun damage', and anything that says 'diminishes lines and wrinkles,' she said.

Dermatologist Dr. Ranella Hirsch says retinols work, but in the past some people found them too harsh. Not anymore.

They've been made and focused on people with very sensitive skins, who historically haven't been able to tolerate using these potent ingredients, said Dr. Hirsch.

Rhamnose is a sugar extract that promises to help fight wrinkles. It targets the layer of tissue in between the dermis and epidermis.

Sending a message for it to increase its regeneration of skin cells, including collagen and fibroblasts, said Hirsch. By extension, the skin looks younger and smoother.

Try rose apple leaf to help reverse sun damage.

It's great when used in conjunction with a product that contains sunscreen, said Ron Robinson, CEO of BeautyStat.com.

Co-enzyme Q10 also a proven anti-oxidant. And Dr. Hirsch says niacin, or vitamin b3, is now known for more than its moisturizing power.

It's gaining new life in its abilities to potentially exfoliate the skin, and also as protecting the skin's barrier, said Dr. Hirsch.

How do you know which product is right for you?

Find the thing that is most concerning to you about your skin, and then target new ingredients based on those items, said Dr. Hirsch. Trying to fix too many things at once is a recipe for disaster.

If you can, try before you buy. Don't be afraid to ask for samples and test products on your arm first. There's no point in spending money on a product that doesn't work for you - or worse yet - causes a skin reaction. And don't be afraid to ask your dermatologist questions.

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