Martha Stewart won’t ‘leave the house without’ this beauty buy — and it’s 20% off for Prime Day

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Whether in the spotlight or the sunlight, Martha Stewart knows a thing or two about taking care of her skin.

The ageless-looking icon, 82, has told Page Six Style on multiple occasions that she swears by Alastin Skincare Hydratint Pro Mineral Sunscreen — and right now, you can score the same product at a steal during Amazon Prime Day .

The SPF-packed formula, which does double duty as light-coverage makeup, is 20% off during the annual event (along with a bevy of other top beauty products .)

Shop 86 Prime Day beauty deals on the skincare and makeup celebs use ‘religiously’

“It really works, and it looks like you have some makeup on,” Stewart raved on her podcast earlier this year, saying she “will not leave the house without it in the morning.”

Prime Day ends tonight—Get fashion deals on celeb-loved clothing from Madewell, Coach, more

She’s also name-checked the bestselling buy during chats with Page Six Style, telling us she uses the “very good sunblock” on a “daily basis.”

Stewart’s not the only famous blonde who swears by the stuff, however, as Alix Earle’s also sung its praises on multiple occasions.

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“I use it every morning,” she told Elle while dishing on her Prime Day shopping list, months after raving to the same outlet that the star-approved sunscreen “has a nice finish to it.”

This SPF is far from the only Stewart-approved beauty product on sale; L’Oréal Paris Lumi Glotion , which the star’s makeup artist uses on her “every day” for a “dewy look,” is also on major markdown.

Earle’s Prime Day picks, meanwhile, also include the over-$100-off Dyson Airwrap , Hero Cosmetics Mighty Patch — a “lifesaver,” per the influencer — and iS Clinical Hydra-Cool Serum , which she said she uses “every night.”

With time ticking on this year’s savings event, just be sure to add to cart fast if you spy something you want. (For more inspiration, be sure to check out our guides to the best fitness , fashion and Oprah-approved finds on sale for Prime Day, too.)

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