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Kristin Chenoweth relies on this secret drugstore find for her summery glow, and it's on sale for $11

Bio-Oil has long been an affordable beauty secret for anyone wanting to diminish the look of scars and stretch marks or give their skin an extra dose of hydration. This drugstore buy is even a fave among celebs — reality royalty like the Kardashians (especially Kim) and actual royalty like Kate Middleton credit it with keeping their skin stretch-mark-free. Over-50 celebrities including Kristin Chenoweth have also been relying on it for decades to give their skin a healthy glow. You can try it yourself at a sweet discount — it's just $11 (down from $14) at Amazon.

Used to diminish wrinkles, scars and stretch marks, this fan-favorite formula is packed with vitamins A and E, chamomile, sunflower and lavender oils.

$11 at Amazon

The celeb-loved oil now has over 37,000 five-star reviewers at Amazon, with shoppers raving about its many uses. So when a sale happens, we're obligated to shout it from the rooftops. If you're like me, you want to reinvent your skin routine for warmer weather — and Bio-Oil is a good place to start. We rarely see it priced much lower, so if you'd like to get your skin summer-ready, now is the time to pounce!

Bio-Oil's popularity stems largely from the fact that it works. It includes vitamin A, vitamin E, chamomile, sunflower and lavender oils, all of which combine to stimulate collagen production and create greater skin elasticity (read: diminished wrinkles). More collagen can also help reduce the look of scars, stretch marks and dark patches.

All those oils also provide some serious hydration — another way to further reduce dark marks, scars and stretch marks. The formula won't clog your pores, so people with oily, dry or combination skin can use Bio-Oil without worry. For those with fresh scars, say from a C-section (or stretch marks from pregnancy itself), Bio-Oil can help with itchiness as it smooths out the skin.

Kristen Chenoweth told Prevention that she uses it around her eyes and on her laugh lines. "I want people to know about it. I love Bio-Oil,” she said. "If you're consistent, it's huge."

Kim Kardashian agrees with Chenoweth. "It just makes my skin glow, and it has so many benefits," Kim has said. "If you have a scar or stretch marks, you just massage the oil onto the area two times a day." She said the formula was a "lifesaver" and she would "apply it like crazy" during her pregnancies.

If you'd like a less starry take on the product, our reviewer here at Yahoo Life tried it for herself — and dubbed Bio-Oil "worth the hype."

Kristin Chenoweth
Kristin Chenoweth is one of the many celebs who sing the praises of Bio-Oil. (Taylor Hill/FilmMagic/Getty)

We'll let some of Bio-Oil's other biggest fans tell you how amazing this stuff is too.

A particularly eloquent user called the oil a "symphony of hydration and nourishment," adding, "What truly sets Bio-Oil apart is its effectiveness in tackling scars and stretch marks. Over time, I've witnessed these imperfections fade away, replaced by a smoother, more even-toned canvas. ... Its nongreasy texture is a cherry on top, making it perfect for everyday use."

Women who have used the oil during and after pregnancy to help prevent stretch marks are among its biggest fans. "I never thought I would be someone to make it through pregnancy with zero stretch marks, and I mean ZERO," said a mega-fan. "I used this Bio-Oil, combined with Palmer's Cocoa Butter for Stretch Marks, twice a day. Morning and night. This was a recommendation I read by a dermatologist before I started showing, and thank God I saw it. ... Every appointment my doctors were shocked and complimented me, and I didn't get why because I didn't know that most women show stretch marks even while they're pregnant."

Older reviewers also extolled the virtues of using Bio-Oil on mature skin. "I have used it for years and, at 78, my skin looks very beautiful," shared one. "I get compliments all the time. Bio-Oil reduces skin discoloration and moisturizes beautifully. I highly recommend it for all women over 60."

One 71-year-old reviewer wrote, "Bio-Oil is the best skin product on the market. I use it twice a day, in the morning and before I go to bed. Small lines have disappeared. My skin is very smooth and seems to glow. ... I have bought several bottles as gifts."

Though many users loved the oil's fresh scent, some didn't take to it quite as much: "Only downside is I don’t love the scent, but it's not super strong," wrote one customer. However, they still gave Bio-Oil a five-star rating, noting, "I didn’t get many stretch marks during pregnancy while using this oil!"

Another reviewer, who gave the product four stars, echoed their sentiment. "The only reason why I wouldn't give this a 5/5 is due to the smell of this. I really hate the smell, but it works so well that I will be looking past that each time I apply it."

Ready to bring home a big bottle? You're in luck — the 6.7-ounce size is also on sale.

$27 at Amazon
Explore More Buying Options
$30 at Walmart$35 at Ulta Beauty

If you have Amazon Prime, you’ll get free shipping, of course. Not yet a member? No problem. You can sign up for your free 30-day trial here. (And by the way, those without Prime still get free shipping on orders of $25 or more.)

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

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