Molly Flores/CNN Underscored

Want more deals? Visit CNN Underscored’s Guide to Prime Day for wall-to-wall coverage of the best discounts to be found during Amazon’s massive sale.

From our favorite skin care to must-have hair care to K-beauty scores, Amazon’s Prime Day deals are here to help you refresh your beauty routine — and save money while doing it. As Underscored’s beauty editor, I’ve spent years testing and reviewing thousands of beauty and personal care products, finding the worth-it purchases that deserve a spot in your makeup bag or bathroom counter. Luckily, there are amazing deals on many of these must-haves this October Prime Day, and I’ve scoured the pages (and pages and pages … ) of products to bring you the ones most worthy of adding to your cart before the sale is over at midnight.

Amazon Prime Day skin care deals

Lowest Price

Take up to 56% off this must-have serum for targeting dark spots and wrinkles. We recommend going for the bigger bottle and getting double the amount of product since it's only a few bucks more than the 1-ounce bottle.

These bestselling eye masks revive and depuff the under-eyes, helping you look and feel more awake.

Editor Favorite

While we saw this buzzy snail serum a few bucks cheaper during July's Prime Day, we can't deny that $13 is still a steal for this ultra-popular product that's great for hydrating dry, dull skin.

Take 50% off BeautyStat's advanced skin care. Created by cosmetic chemist Ron Robinson, this thick moisturizer is a favorite for hydrating dry, aging skin.

Our favorite under-eye patches for dark circles are on sale for 20% off. They're infused with caffeine, hyaluronic acid and niacinamide to depuff and brighten.

Editor Favorite

One of my favorite vitamin C formulas, this anti-aging serum is now the lowest price it's been all year. Take 30% off the full size of the brightening and smoothing serum.

The Laneige Lip Sleeping Mask is the ultimate remedy to chapped lips, especially during the winter. Enjoy it now at 30% off.

This cooling eye gel was one of my favorite new products this summer, and now you can snag the new launch for 30% off. The ceramic applicator feels so refreshing for tired eyes.

Now 25% off, these unique cleansing tablets dissolve in water and create a soft, gentle lather to effectively cleanse the skin. When you spend $30 on any Olay products, you can also submit your receipt and get $10 back from Olay's Up Late Rebate.

Editor Favorite

This makeup artist-approved cream is also one of my favorite hybrid skin care and makeup products. The super-sheer, tinted cream is perfect for adding a healthy glow when your skin looks dull. Try it now for 25% off.

A cute pre-holiday gift for yourself or a friend, this cute beauty Advent calendar delivers 12 days of surprise lip balms.

Editor Favorite

A French skin care favorite, this editor-approved face toner mist is 20% off. Spritz the relaxing mist for an extra hit of hydration whenever you need a pick-me-up.

Lowest Price

Don't worry about dry skin and creases with this rich avocado-infused eye cream that's 40% off — the lowest price we've ever seen it on Amazon.

Save $75 on this microcurrent kit that's like a workout for your face. Use the device consistently for a more lifted, contoured and toned look.

This viral collagen mask turns transparent as it absorbs into your skin. Get the overnight firming and hydrating treatment for 32% off a pack of four or 15% off a pack of 16.

If your skin is feeling dramatically dry, you'll love this deal on Clinique's moisturizer. Save up to 35% during Prime Big Deal Days.

If you were looking to upgrade your toner, a 4-ounce bottle of Paula's Choice Skin-Perfecting Liquid Exfoliant is 20% off right now.

Save 40% on the newest generation of Solawave's anti-aging red light and galvanic current wand, along with a hydrating serum you can use for the treatment.

These metallic eye masks are 30% off for Prime Day. And they don't just look pretty; they also treat the under-eye with peptides and soothing aloe to reduce the look of dark circles and eye bags.

It's the first time we've seen these wrinkle-reducing retinol capsules on sale, and for 43% off to boot.

This expert-recommended drugstore face wash is now the lowest price we've seen it this year.

Save $5 on this daily sunscreen that absorbs easily and doesn't leave a white cast.

All sizes of this luxe ginseng-infused serum are 30% off for Prime Day. The premium beauty product is made with Korean herbs and antioxidant-packed ingredients to hydrate and balance the skin.

Amazon Prime Day oral care and grooming deals

Upgrade your oral care routine with this oscillating toothbrush, now 40% off. It features multiple settings and comes with a travel case and two brush heads.

These bestselling whitening strips will help get your pearly whites shining in no time.

For quick and easy teeth whitening, this simple-to-use pen gives results overnight and doesn't irritate sensitive teeth.

Editor Favorite

A product we love to see on sale each Prime Day, this viral trimmer is the bestselling personal groomer on Amazon and gentle enough to use on intimate areas.

Editor Favorite

This nail strengthener applies like a polish and makes a noticeable difference for weak, brittle nails in just a few uses.

Editor Favorite

This electric toothbrush has eco-friendly, plant-based brush heads that the brand will recycle, two cleaning modes and the option to upgrade to a set paired with a UV cleaning travel case. Get 20% off the editor favorite for Prime Day.

Best Tested

After testing a bunch of press-on nails, we found that Glamnetic's were the easiest to apply and remove. There's an assortment of festive designs on sale for Prime Day.

Just under $100 for the event, this sleek lighted makeup mirror is cordless, rechargeable and dimmable, plus the mirror itself can be taken off the stand so you can get the best view for makeup application.

Get up to 50% off this lash growth serum that actually works (we've tried it ourselves).

Best Tested

Our favorite press-on nails with unique and pretty designs are 25% off on Prime Day. Choose from over more than designs.

Prime Day is a great time to save on essentials, like your grooming routine. This set from Harry's is now 20% off and includes shaving gel, a razor and four blade refills.

This shave set is designed specifically for use below the belt. You can grab the seven-piece basic set for just $15 or opt for the razor, shave gel and exfoliating serum for $23 at 25% off.

Amazon Prime Day makeup deals

This travel-friendly version of Urban Decay's cult-favorite Naked palette features six versatile shades for a natural look.

Want bold lashes? Then try this fan-favorite mascara that makes lashes look instantly plumper, fuller and bolder.

Add staying power to your makeup look with this award-winning makeup primer, now 25% off.

Editor Favorite

After testing a variety of drugstore mascaras, we think that this product is the best smudge-proof formula for the price.

Get this favorite drugstore mascara for under $10. The two-step formula primes and lengthens the lashes for maximum effect.

Editor Favorite

Take 40% off this editor-favorite brow pencil that makes it easy for anyone to shape and fill in their eyebrows like a pro.

This creamy, bouncy lip and cheek color is going viral for its cushion-like formula and range of 30 juicy shades — all 20% off for Prime Day.

Amazon Prime Day hair care deals

Editor Favorite

This deliciously scented leave-in conditioner helps my hair feel soft and hydrated. Plus, it smells like a treat!

Whether you want to tame flyaways or do a full slicked-back look, this styling stick is a must.

Editor Favorite

This expensive but totally worth it hair tool will replace your hair dryer and curler. It comes with a whole suite of attachments for any hair look you want to achieve.

Ouai Leave-In Conditioner nourishes hair and minimizes frizz. You can add the full-size version to your cart for 22% off during Prime Big Deal Days.

The T3 AireDeluxe Hair Dryer Set is 30% off for Prime Big Deal Days. It's the lowest price for this set we've seen all year.

This multiuse styling tool is a whooping 48% off for Prime Big Deal Days. Achieve waves, curls and straight hair for an incredible price.

Editor Favorite

It's a great time to invest in the Revlon One-Step, currently at 25% off for Prime Big Deal Days. One editor bought this tool during a Prime Day three years ago and still uses it to create a salon quality look at home.

Take $10 off the 4-ounce jumbo size of this weightless hair oil that instantly makes hair look shinier and smoother.

You can save 25% on Virtue's favorites this Prime Day, including its multipurpose styler that primes and protects the hair. And don't miss clipping the on-page coupon for an extra 30% off.

Shampoo bars are an easy sustainable swap to make in your beauty routine that will also save you money in the long run. Ethique makes my personal favorites, which are formulated for specific hair types and needs.

Amazon Prime Day fragrance deals

Cashmere Mist has been an icon for decades. For the woman on the go, this set includes two travel-friendly sprays so you can keep your fragrance in your purse or travel bag.

Take $20 off this airy, clean-scented perfume from indie fragrance brand Land & Skye.

Take 30% off this warm floral fragrance that looks as beautiful as it smells. It features notes of vanilla, iris and patchouli.

How we chose the best beauty deals on Amazon Prime Day

Amazon has a treasure trove of beauty finds — from viral hits to splurge-worthy tools — but there are a lot of not-so-valuable products and deals mixed in too. As a beauty editor, I’ve tested countless products across skin care, hair care, makeup and more, and honed my eye to spot the ones that are actually worth your money. As these go on sale during Prime Day, I’ll double-check the price history to determine if the product has a new discount and if the sale price is the lowest we’ve seen. Personally, I think deals on beauty products are only worth it if you’re saving 20% or more — unless it’s a super-rare deal on a product that never goes on sale.

Why you should trust CNN Underscored’s beauty editors

We will only recommend products and deals that we’d personally shop ourselves. Since we spend so much time testing and reviewing, we know how important it is to find products that will actually make a difference. We also know that beauty products are especially personal, and everyone will have their own needs and goals when it comes to their skin, hair or makeup. I’ll always note when a product may be better suited to a particular skin type or hair texture, or if certain groups should avoid a product altogether. Beauty products should build confidence, and we want you to feel confident in our recommendations too.