The antioxidant-packed Brazilian açaí berry first came on our radar in 2007, when the ingredient began showing up in health drinks promising to youth-ify our bods from the inside out.

Shortly after, skincare companies harnessed the powerful free radical-fighting properties of this red berry to help reverse skin aging and prevent future damage.

So why -- two years after açaí first came on the scene -- is Kiehl's new Açaí Damage-Repairing Skincare Collection such a big deal? That's the question I posed to Chris Salgardo, President of Kiehl's USA. Turns out the answer is pretty major -- the products are 100% natural origin and contain an unprecedentedly high amount of potent açaí.

"Our Açaí Damage-Repairing Skincare Collection is unique because of the products' high concentration of açaí," explains Salgardo. "Açaí Damage-Repairing Serum contains 10% extract of açaí, which is an extremely high concentration, as most other products contain less than 1% of any active ingredient in their formulations."

That means the products actually work: After a four-week clinical study, "the results were outstanding," says Salgardo. "We were thrilled to find that a significant percentage reported that their skin looked and felt four years younger." That's one year per week!

And environmentalists can rejoice. It took two years for Kiehl's to develop the line because of the challenge to create effective products that are all natural, certified organic by EcoCert, paraben-free, and gold level Cradle To Cradle certification. What's that, you ask? Cradle To Cradle is an environmental award based on criteria for sustainable packaging, use of renewable energy, water efficiency, and other earth-saving measures. Um, not an easy award to get!

"We listened to what our shoppers were requesting," continues Salgardo. "A natural, paraben-free, organic skincare range that repairs and protects against the first signs of aging. We took that a step further and focused on an ingredient that protects skin so that it can actually heal itself."

Kiehl's Açaí Damage-Repairing Skincare Collection includes a cleanser, toning mist, serum and moisturizer and is available now at Kiehls.com.

Why not attack aging from the inside, too? See how you can also eat your way to younger skin with these age-defying super foods!