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This celeb-approved serum smooths fine lines and wrinkles, and it's $24 at Amazon's Big Spring Sale

Score the highly-rated retinol serum for 25% off, today only.

Sure, we all know the importance of retinol-infused products for your skin, but how do you know you're using the right one? There are so many on the market — serums, gels, moisturizers, and more — and all at different concentrations. According to dermatologist Dr. Shereene Idriss, finding the right retinol for you goes far beyond just picking the product with the highest concentration. In fact, she notes that percentages can be "extremely misleading" and shared one product she loves that's surprisingly affordable. "When it comes to retinol, I love this guy by L'Oreal," she shared on New in the Q. "It is a pure retinol at 0.3 percent." That pick? L'Oreal Paris Revitalift 0.3% Pure Retinol Night Serum, and it's on sale for just $24, today only, courtesy of Amazon's Big Spring Sale.

This serum includes 0.3% pure retinol, a powerful formulation of the skin-loving ingredient known to help moisturize and prevent the visible signs of aging.

$30 at Amazon

Why is this a good deal?

At-home retinol treatments in the same size as L'Oreal Revitalift (1 oz.) can set you back upwards of $60 a bottle; in-office retinol-intensive treatments can cost much more. However, for a great percentage of pure retinol (0.3% — more on that later) you'll be spending less than $25 a pop now with Revitalift thanks to Amazon's Big Spring Sale. We haven't seen this serum marked down much lower than that, so if you'd like to give it a try, the time is now to pick one up for yourself. Oh, and a big bonus? Along with the serum you'll also receive a free trial-size sample of L'Oreal's Triple Power Fragrance-Free Face Moisturizer, which is suggested as an after-retinol hydrator for overnight skin care. "Free" is definitely our favorite price!

Why do I need this?

L'Oreal Paris Revitalift 0.3% Pure Retinol Night Serum helps reduce wrinkles while soothing and moisturizing your skin. It's also formulated without any fragrances, parabens, or silicone. The secret sauce is in the 0.3% pure retinol formula. According to the Cleveland Clinic, "retinol, a form of vitamin A... has anti-aging effects and can help clear acne." Hence, why you've seen it pop up on tons of skincare products in the last few years.

Don't be fooled by what seems like a low percentage of retinol in this serum, however. "Most people do not understand [the] percentages," explained Dr. Idriss. "They can be extremely misleading." The good doctor suggests always checking the labeling to see how the percentages really break down. The "0.3%" in this particular formula is pure retinol. That pure retinol works faster than other retinol derivatives, so you're getting a concentrate of the real deal, versus a formula that includes other retinol derivatives and complexes in its overall listed retinol percentage.

No surprise, then, that Revitalift delivers results: In a clinical study, over 100 percent of women noticed a reduction in wrinkles (yes, even those deep ones). Just don't forget — always lather on some SPF the morning after using a retinol product!

L'oreal Revitalift Serum
Say goodbye to those wrinkles. (Amazon)

What reviewers say

Over 8,000 Amazon shoppers agree — this retinol-rich serum has absolutely changed their skincare game. "This is THE BEST retinol product I’ve found hands down! It means business!" shares one five-star shopper. "I’m 52, wrinkle-free, and EXTREMELY attentive to keeping my skin youthful. After using this product for a mere one week and seeing great results already, this is one product I will most definitely keep using regularly. I have (had) one tiny forehead crease starting to form; after using this retinol for one week I already see it diminishing!"

One reviewer even dubbed it the "fountain of youth." She added: "Time in a bottle! This stuff is amazing! Wish I had taken a 'before' and 'after' picture. Worth every penny. Visible results in three days, not kidding. Turned 40 this year, and frown lines were getting bad. Tried all kinds of products, and this one worked!"

"I’m so happy with the results of this," shared another satisfied writer. "The commercial is true. It really works. My skin has never looked this good. I look ten years younger than my 70 years."

Several users cautioned to stick to the product directions when applying: "This a superior form of retinol, but it's a pretty strong potency for the price," advised one. "If you are a newbie or have sensitive skin, the practical thing to do with any new product that is going to go on your face is to do a patch test first, right at your inner elbow area. Wait 24 hours. If you have a reaction, this is not the product for you at this time."

'My skin has never looked this good. I look 10 years younger than my 70 years,' marveled one user.

$30 at Amazon

The reviews quoted above reflect the most recent versions at the time of publication.

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Your Spring Sales Shopping Guide: Spring sales are in the air, headlined by Amazon’s Big Spring sale event. Our expert editors are curating all the best spring sales right here. Follow Engadget to shop the best tech deals from Amazon’s Big Spring Sale, hear from Autoblog’s car experts on the best spring auto deals on Amazon, and find spring sales to shop on AOL, handpicked just for you.

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