Beauty Hair Hair Products & Tools Shoppers With Thinning Hair Say This Shampoo Makes Their Strands Feel Fuller — and It's on Sale Even “baby fine hair” looks thicker. By Rachel Nussbaum Rachel Nussbaum Instagram Twitter Rachel is a journalist, writer, and editor who specializes in the beauty and wellness industry, writing about the best, safest products the industry has to offer for InStyle, Byrdie, and Shape. InStyle's editorial guidelines Published on June 17, 2022 @ 02:00AM Pin Share Tweet Email We independently research, test, review, and recommend the best products—learn more about our process. If you buy something through our links, we may earn a commission. Photo: Getty Images Mark your calendars: Amazon Prime Day 2022 is returning this summer, as the shopping giant recently announced, landing on July 12 and 13. Prime Day always means mega-sales on hundreds of products, but the run-up of deals is often just as alluring. Take Pura D'Or's Concentrated Biotin Shampoo: the powerful formula shoppers call a gift for thinning strands, is currently over 30 percent off. Hair thickening products are often hit or miss, but Pura D'Or has a reputation for developing potent haircare that works, like its Original Gold Label wash — Amazon's best-selling hair regrowth shampoo. Per the brand, the on-sale version uses twice the concentration of the ingredients that make the original so good, namely argan, tea tree, rosemary, and black cumin seed oils. It's also formulated with a cocktail of nettle, pygeum bark, biotin, and saw palmetto extract that blocks inflammation and hair loss-linked DHT, so hair appears fuller and thicker. As board-certified dermatologist Joshua Zeichner, MD, previously told Byrdie, "Saw palmetto is a botanical extract that has been shown to block the effect of androgen hormones. We know that high levels of these hormones are associated with hair thinning, so blocking them may theoretically improve hair growth." Courtesy Shop now: $23 (Originally $35); amazon.com The aloe at the forefront of the Concentrated Biotin Shampoo is another powerful ingredient, as dermatologist Jeriel Weitz, MD previously told InStyle. Its essential amino and fatty acids strengthen hair, she said, and the ingredient contains enzymes that reduce inflammation when used topically. On top of that, trichologist Isfahan Chambers-Harris, Ph.D., said that aloe lowers hair's pH, which leaves it shinier and more hydrated. And users continue to attest to the impressive results. One customer dealing with hair loss from "considerable" stress said it "significantly" decreased their shedding after three uses, while a second fan confirmed that it left their "baby-fine hair" looking thicker. Another reviewer with thinning hair wrote that their tresses felt fuller since incorporating Pura D'Or's shampoo into their routine, and per a last enthusiast, it even helped "thicken up" their hair and stop breakage post-menopause. If you'd like to try Pura D'Or's Concentrated Biotin Shampoo, get it for $23 at Amazon while it's discounted ahead of Prime Day.