80,000 Bottles of This Apple Cider Vinegar Shampoo Sold on Amazon in One Day, and It's on Sale Before Prime Day

While you may think of apple cider vinegar as a pantry staple for salad dressings and marinades, it's also beneficial for your scalp and hair health. Celebs like Kourtney Kardashian swear by the ingredient for hydrated, shiny hair, and thanks to an incredible early Amazon Prime Day sale, you can try the treatment out for yourself. The Wow Apple Cider Vinegar Shampoo and Conditioner Set with 34,500 perfect ratings is on sale for $29.

In a previous interview with InStyle, cosmetic dermatologist and founder of SmarterSkin Dermatology Dr. Sejal Shah said, "Because apple cider vinegar is acidic, it can help restore pH of the hair and scalp as many hair products are alkaline and raise pH." She added that "by restoring pH, it can close the hair shaft's cuticle, making the hair appear smoother, shinier, and easier to manage."

Wow's Apple Cider Vinegar Shampoo and Conditioner Set has been a best-seller for nearly three years, and 80,000 bottles once sold on Amazon in a single day. The shampoo uses natural apple cider vinegar as its main ingredient, while the conditioner has coconut and avocado oils to nourish damaged hair and moisturize dry scalps.

Shop now: $29 (Originally $35); amazon.com

"This shampoo is truly life-saving," one reviewer wrote. "I have dermatitis and have tried EVERYTHING, including prescription shampoo, and nothing would stop the buildup. My beautiful hair was gunky and lacked all the shine. And then I tried this shampoo and my hair seems back to normal! Wish I could give it even more stars."

A second shopper said, "The name of the brand is no joke ... wow! It works. My hair is so soft and feels clean and healthy, even though I'm overdue for an appointment with my hairdresser. When I blow dry it, it looks shiny and strong."

According to the brand, these products are safe to use whenever you wash your hair, whether that's once a day or a couple times a week. They're both vegan, paraben- and sulfate-free, and color-safe.

Before Amazon Prime Day officially begins on Monday, be sure to take advantage of this early deal on Wow's Apple Cider Vinegar Shampoo and Conditioner Set and give your hair the quality products it deserves.

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