16 Amazon Hair Growth Serums and Oils That Thicken Shoppers' Strands

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I run through my hair care products faster than I would like to admit. After all, my weakened strands need a lot of attention, especially when it comes to tackling thinning hair. Fortunately, it won’t cost a fortune to stock up on hair products this time around, thanks to Amazon Prime Day. The major sale event just lowered prices on countless hair growth products that will revive my thin hair. 

If you’re also dealing with hair loss, I suggest adding these discounts to your cart before this 48-hour event ends on July 17; plus, some Prime Days deals may only last for 24 hours. Just be sure to sign up for a free 30-day Prime membership to take advantage of these markdowns, including exclusive offers. Not exactly sure where to start? I sifted through Amazon’s Prime Day offerings to find the top picks for thinning hair. Below, check out these 16 hair growth deals starting at just $8. 

Nioxin’s Ultimate Power Serum is suitable for all levels of thinning, and it’s 34 percent off right now. It contains ingredients like caffeine, niacinamide, sandalore, and more that work together to stimulate hair follicles and improve scalp health to promote growth. At the same time, this leave-in formula also strengthens strands over time to prevent further hair loss. Just apply 12 to 15 pumps on dry or damp hair to see results within weeks. I can attest to Nioxin’s hair growth formulas that deliver a fuller-looking mane within a month. Additionally, one reviewer raved that this on-sale serum transformed their hair as it left it “thicker, stronger, and more vibrant than ever before” as well as “more resilient.”

The Wild Growth Hair Oil is a popular choice among shoppers with more than 23,000 five-star ratings. It’s packed with nourishing oils such as coconut oil, olive oil, jojoba, along with cocoa butter that enhance hair’s thickness and softness for more manageable tresses. One reviewer even remarked that their mane “grew like weeds” in one month. Luckily, there’s no better time to stock up on this hair growth formula than while it’s $10 now during Amazon Prime Day.

Rogaine’s Hair Regrowth Treatment contains an ingredient that’s super effective for hair regrowth: minoxidil. This FDA-approved active ingredient stimulates blood flow to the hair follicle to allow for hair growth. Shape editors have also tried and approved of this anti-thinning formula, while an Amazon reviewer adds that it makes their hair grow “fast and thick” as it makes their hairline look “fuller.” Nab this hair growth treatment with more than 10,000 five-star ratings at Amazon for 33 percent off during Prime Day. 

Cleanse your hair while adding visible thickness to it thanks to the Viviscal Thickening Shampoo. It’s infused with biotin and keratin that are known to improve hair’s strength, elasticity, and smoothness. Other key extracts are marine collagen and seaweed that also aid in reducing breakage in strands to promote fuller hair. Now, you can add this thickening shampoo to your cart for just $9. 

Mielle’s Rosemary Mint Scalp and Hair Strengthening Oil is a personal favorite of mine. I swear by this daily treatment for improving the thinning spots around my hairline as well as for scalp dryness. And I’m not the only one—it has more than 66,000 Amazon shoppers’ full approval and more than 100,000 people have bought it this last month. This best-seller is formulated with rosemary and biotin to boost hair’s strength, moisture, and shine. While it’s only $2 off, this strengthening oil’s budget-friendly price at just $8 is still a steal. 

Tackle thinning hair with Marc Anthony’s Grow Long Super Fast Strength Shampoo and Conditioner Set that’s discounted to $14—that’s just $7 apiece! This duo is made with an anti-breakage formula that contains caffeine and ginseng that promotes longer hair. What’s more, it gives your hair a deep cleanse and moisture for a radiant shine. Reviewers said their mane appears “full and fluffy,” “softer and stronger,” and that it “cuts [their] shedding in half.” 

If you want thicker hair in seconds, try the R+Co Dallas Biotin Thickening Shampoo that’s marked down to $27 at Amazon. It adds volume to fine or thin hair in an instant, while simultaneously nourishing strands thanks to its formula infused with biotin and vitamins. An Amazon reviewer affirmed that this thickening shampoo delivered “lift and volume” to their thinning hair. 

Avalon Organics Therapy’s Biotin B-Complex Thickening Shampoo is loaded with botanical ingredients to energize the scalp with every wash to encourage a thicker-looking mane. What’s more, it contains vitamin E that increases your hair’s strength to assist in maintaining your hair’s growth. Best of all, you can add this thickening formula to your cart for $13 during Prime Day. 

John Frieda’s ULTRAfiller+ Thickening Conditioner is a super affordable option when it comes to hair growth treatments. It’s originally $12, but you can score it for even less during Prime Day. The now-$9 treatment is made with biotin and hyaluronic acid to visibly plump fine hair, leaving a thicker and softer appearance. One reviewer mentioned that this discounted conditioner “added fullness to [their] thinning hair.”