A Shopper’s Thinning Hair Is ‘Visibly Thicker’ Thanks to This $9 Growth Oil

Dealing with thinning hair isn’t easy; maintaining a healthy mane is a constant challenge when it’s not growing or looking lush. While it’s normal to lose strands, sparse spots and excessive shedding make it difficult to improve your hair’s appearance. The good news is that there are plenty of simple yet effective hair-growth products to save your thinning tresses. Even better, you can score them for as low as $9 during Amazon’s Big Spring Sale. To make it easier, I sifted through countless options to find the top eight picks under $40 that thicken and strengthen strands.  

Best Amazon Spring Sale Hair-Growth Deals: 

• 8,000+ Five-Star Ratings: Rogaine 5% Minoxidil Foam, $33 (was $43)
• Lowest Price: Soapbox Oh My Growth Oil, $9 (was $10) 
• Divi Scalp Serum, $35 (was $48) 
• Botanic Hearth Rosemary Shampoo, $15 (was $20) 
• Keranique 2% Minoxidil Topical Treatment, $19 (was $30) 
• The Mane Choice Alpha Multi-Vitamin Growth Oil, $11 (was $13) 
• Eco-Friendly Option: Kitsch Rice-Water Bar Shampoo and Conditioner Set, $22, (was $28) 
• L Luseta Biotin Hair-Growth Serum, $15 (was $23)

Rogaine 5% Minoxidil Foam

Rogaine’s 5% Minoxidil Foam specifically targets hereditary hair loss and thinning. It uses a higher concentration of the FDA-approved active ingredient, minoxidil, that “prolongs the growth phase of the hair cycle and increases blood flow to the scalp,” explained Dr. Ross Kopelman, a hair transplant surgeon, in a previous Shape interview. Keep in mind, though, minoxidil should not be used when pregnant or if increased shedding or irritation occurs. 

Soapbox Oh My Growth Oil

Hair-growth products can be extremely affordable, like this $8 find. According to shoppers, the Soapbox Oh My Growth Oil boosts length and leaves “thinning” strands “visibly thicker” and stronger. It’s thanks to biotin, omega-3s, and collagen that prevent breakage and encourage a denser appearance. Some studies suggest that vitamin C,  the oil’s other key ingredient, reduces dihydrotestosterone (DHT) levels, a hormone responsible for hair loss. 

Divi Scalp Serum

The Divi Scalp Serum is formulated with a number of hair-thickening ingredients like caffeine, peptides, rosemary, and amino acids. One reviewer even claimed it made their strands “grow like weeds.” It also reduces excess oil and buildup, as well as deeply hydrates the scalp to create a healthier environment for growth. The best part? It’s a water-based formula, so it won’t weigh down hair or feel greasy. All hair types can benefit from this growth product, and it’s already 27 percent off ahead of Amazon’s Big Spring Sale. 

Botanic Hearth Rosemary Shampoo

Tackle thinning hair with the $15 Botanic Hearth Rosemary Shampoo that cleanses buildup and gives strands a thicker appearance thanks to its key ingredient, rosemary. This extract increases the hair’s density, similar to minoxidil. Plus, the shampoo’s other nourishing ingredients — argan oil, jojoba oil, and coconut oil — are helpful for soothing a dry scalp and softening strands. 

Keranique 2% Minoxidil Topical Treatment

The Keranique Topical Treatment is another top-rated hair-growth option with minoxidil, though it contains a lower concentration that’s less prone to cause irritation and itching. This revitalizing formula comes with a spray applicator that targets thinning areas more precisely. More than 4,000 Amazon shoppers bought it in the last month, saying it leaves them with “new hair every day.”.

The Mane Choice Alpha Multi-Vitamin Growth Oil

The Mane Choice Alpha Growth Oil is packed with vitamins and nutrients that promote natural hair growth. It reduces hair fall and soothes irritated scalps with strengthening ingredients like biotin, rosemary, rice, and sage extracts. Bonus: It’s only $11 during Amazon’s Big Spring Sale, so you can stock up without breaking the bank. 

Kitsch Rice-Water Bar Shampoo and Conditioner Set

The Kitsch Rice-Water Bar Shampoo and Conditioner Set is a sustainable alternative with zero waste. The key ingredient in both products is rice water, which is known for its strand-strengthening and -volumizing benefits that encourage a denser appearance. At the same time, these hair-growth products boost shine and softness in damaged locks. 

L Luseta Biotin Hair-Growth Serum

The L Luseta Biotin Serum is everything you’d want in a solid hair-growth product: It’s nourishing, thickening, and budget-friendly. This biotin and collagen treatment keeps tresses shiny and smooth while promoting regrowth. Shoppers rave that their strands “grow longer without breakage” and thinning edges have “fully grown out” after using this now-$15 serum.