You Can Get Keranique's Entire Hair-Growth System for 56% Off at Amazon

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If you've noticed extra strands of hair piling up in your shower drain or getting caught in your brush recently, it may be time to revamp your haircare routine. There are tons of products that are formulated specifically to stimulate new hair growth and strengthen your existing locks, and thanks to an epic Amazon beauty sale, you don't have to choose just one. The entire Keranique Hair-Growth System is 56 percent off right now.

For $40, you'll get the Scalp Stimulating Shampoo, the Volumizing Keratin Conditioner, the Follicle Boosting Serum, and the Lift and Repair Treatment Spray. All of the products in the set are paraben- and sulfate-free, not tested on animals, safe for color-treated hair, and designed for all hair types, from straight to wavy to curly.

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Shop now: $40 (Originally $90), amazon.com

A main ingredient in both the shampoo and conditioner is keratin, which is "the protein that essentially forms the structure of hair, promoting healthy, beautiful growth," dermatologist Dr. Michele Green previously told InStyle. The shampoo is also made with panthenol, which is a form of vitamin B5 that can "improve scalp health and potentially reduce hair shedding," New York-based dermatologist Dr. Rachel Nazarian explains to InStyle. In the conditioner, you'll find peppermint oil and ginseng root extract to stimulate hair growth.

The Follicle-Boosting Serum is packed with nourishing ingredients, including glycerin, which Dr. Nazarian says can hydrate your hair and prevent breakage, and keratin and collagen to promote new growth and strengthen your locks right from the roots. To finish off the routine, the Lift and Repair Treatment Spray works as a heat-protectant, tames frizz, and creates volume for instantly thicker-looking hair.

Hundreds of Amazon shoppers swear by this four-step system to strengthen, thicken, and soften their hair. "This product accomplishes exactly what it claims and more," one wrote. "The visible difference in areas of thin patches after one shampoo was startling! I cannot be more delighted, as it has been many years since I have experienced the elimination in [the] appearance of [my] 'pink' scalp."

Another reviewer said, "The first time I used it, I noticed that no hair fell out in the shower. I've been using it now for almost a month, and [there is] no hair in [my] shower drain. My hair looks and feels fuller. I love this product."

You truly can't beat this deal on top-rated hair care products, so we highly recommend grabbing the Keranique Hair-Growth System for 56 percent off at Amazon before it's too late.