Amazon is a treasure trove of… well, everything — including hair-growth products. Better yet, many of the most highly rated tinctures, serums, and growth-supporting shampoos — including the shampoo brand that Alyssa Milano said “helped tremendously” to regrow her hair after Covid-19 caused loss and thinning — are on sale for Black Friday, with deals up to 50 percent off. 

Below, shop five of the best hair growth product deals at Amazon, starting at just $15:

Shop Hair Growth Products on Sale at Amazon:

Nioxin System 2 Cleansing Shampoo

A hair growth shampoo and conditioner set provides a user-friendly, in-shower method of boosting volume and strands — without adding an extra step to your routine. As previously mentioned, Milano praised the Nioxin shampoo and conditioner for facilitating hair growth. Peppermint and caffeine star in this formula, where they stimulate hair follicles and, in turn, promote new growth. You can snag both the System 2 shampoo and accompanying conditioner (which are formulated for sensitive scalps with progressed thinning) for $15 each right now.

Pura D’Or Anti-Thinning Biotin Shampoo and Conditioner Set

The hundreds of five-star Amazon ratings speak for themselves: this shampoo and conditioner set works. Specifically, it adds instant volume to limp, lifeless strands, and supports healthier hair with less shedding over time. According to one shopper, whose hair had been coming out in “clumps” prior to trying the shampoo and conditioner, they were “shocked” by “how little hair collected in the drain and came out in my brush” after they’d incorporated the products into their hair-washing routine. A blend of herbs, plus aloe and vitamin E help reduce hair fall and leave strands shiny, strong, and soft.

Lanmeri Vegan Hair Growth Serum

This potent, plant-based growth serum relies on protein-rich mungbean to strengthen strands, and caffeine to stimulate new growth. Used daily, the fragrance-free, non-greasy serum delivers results in 90 days, per the brand. Shoppers say it’s helped “fill in” sparse areas, while others say their “fine hairs are thickening into regular hairs, and more baby hairs keep sprouting.”

UltraX Labs Hair Growth Shampoo and Conditioner

Caffeine plays a key role in this growth-stimulating shampoo and conditioner set. So, too, does saw palmetto, which studies suggest may function as a natural DHT blocker. In other words, the ingredient may inhibit the production of hormone dihydrotestosterone, which has been linked to hair loss. Anecdotal evidence from shoppers is undeniably strong; more than 7,800 people have left the duo a five-star rating. According to one user, the shampoo has made their hair “thicker and fuller,” and they’ve noticed “accelerated” growth plus less fallout. Another shopper said their hair appears “fuller” along their forehead and there were “no wispy hairs slipping out because the elastic was too loose.” 

Nutrafol Root Purifier Shampoo

Hailing from the brand behind the dermatologist-recommended Nutrafol hair growth supplements, this volumizing shampoo delivers instant lift at the roots, plus a clean, fresh feel post-use. One shopper said the shampoo is “like magic” for adding volume. Per the brand, you can expect a more hydrated, less flaky scalp in mere weeks. While this formula won’t, in and of itself, grow new hair, it does support a healthy scalp microbiome. And a healthy scalp equals healthy hair, after all.