The Very Best Products For Thinning Hair Of 2024, Tried & Tested

This cult-favorite serum contains Nicotiana benthamiana for its anti-inflammatory properties, turmeric to calm and nourish the scalp, and red clover and mung bean extracts to neutralize free radicals. Mung bean sprouts also have a high concentration of zinc, silica, iron, and several vitamins, while red clover contains a very powerful flavonoid that is able to soothe irritated scalps. Plus, it has peptides to help support collagen production and caffeine, which has the ability to stimulate the scalp. It’s truly a five-star meal for your follicles—there’s a reason over 3,000 shoppers sing its praises. 

What our tester says:

"This is truly one of the best hair growth serums out there. I’ve been dealing with some sparser areas near my temples, and after a couple months of using this serum, I’ve finally noticed my baby hairs starting to grow back." —Jamie Schneider, mbg beauty editor

This cult-favorite hair serum consistently sells out and once racked up a 3,500-person waitlist—so you know it’s good. And it has just three simple (yet powerful) ingredients: organic sunflower oil to coat the strands in moisture, jasmine essential oil to nurture the scalp and provide antimicrobial properties, and amla extract, a classic Ayurvedic ingredient with powerful antioxidant abilities. If you’re a fan of jasmine, you will no doubt fall in love with the delightful scent. Personally, I find it smells like pure luxury.

What a tester says: 

"For those dealing with increased shedding right now (self very much included), a hair growth serum can keep your locks strong and help encourage thicker strands. I've tested more serums than I can count at this point, but RANAVAT's simple yet luxurious formula will surely remain a staple in my routine. Considering how often I use it, I'll be hitting the bottom of the bottle pretty soon."—Schneider

Look, the main component of hair (about 95% of it, in fact) is the protein keratin. And in order for the body to make keratin, you need amino acids (or building blocks of protein). That’s where collagen comes into play: Specifically, collagen supplements that contain proline, an amino acid that promotes hair growth, can help create the protein that makes hair and supports growth.

You can read more about collagen for hair here, but know that our specialized blend is the best of the best. It contains 17.7 grams of grass-fed bovine hydrolyzed collagen peptides, as well as other hair-healthy ingredients like biotin, hyaluronic acid, vitamins C and E, curcumin from turmeric extract and sulforaphane from broccoli seed extract.*

This sulfate-free wash is brimming with some of the best, science-backed ingredients for hair growth: copper peptides, zinc, caffeine, and biotin support thicker looking hair at the root, while vitamin E and CoQ10 provide an antioxidant shield for free radicals. If you really want to supercharge the results, give yourself a tension-relieving scalp massage as you work in the product. Regular scalp massage, after all, has been linked to hair growth. 

The hero here is the brand’s ProCelinyl, an ingredient discovered by AI technology that directly reawakens dormant hair follicles—with a 97% success rate in clinical trials. With argan oil, castor oil, grapefruit extract, olive leaf extract, and vitamin E, it drenches the hair and scalp with nourishing fatty acids and antioxidants. The brand promises thicker, fuller hair in as little as six weeks; they’re so confident, in fact, that if you don’t start seeing results after 120 days, they’ll refund your entire purchase. Worth a shot, don’t you think?

Microneedling can be used along with hair growth serums to boost their efficacy—see, the tiny spikes create microchannels that allow for increased product absorption. So when you apply that subsequent serum, it should work even better; this one by BeautyBio contains zinc, camellia leaf extract, and a host of other antioxidant-rich botanicals to support the follicles. Plus the dermarolling tool is top notch for stimulating circulation on the scalp, which is great for hair growth. Just be sure to use it on freshly cleansed hair always follow up with the hydrating scalp serum. 

The Inkey List is known for their potent, high-quality formulas at a budget-friendly price point, and their beloved hair treatment certainly fits the bill. In addition to peptides, it contains panthenol, castor oil, and betaine to simultaneously condition and strengthen your locks. This is a lightweight, silky serum that immediately makes your strands appear fuller—simply rake it through clean, damp hair from root to tip and style as usual. Your mane will look noticeably less limp, promise.

More than a topical, this hair-supporting system includes a supplement blend packed with saw palmetto extract, marine collagen, and ashwagandha for inside-out support. The serum contains follicle-stimulating ingredients, like lactic acid, tea tree, and caffeine, so you really get a well-rounded hair healthy experience. Circle back within three to six months, and you should notice a difference.

Ask any derm their favorite natural botanical for hair growth, and chances are they’ll mention rosemary oil. All that hype is mainly due to a 2015 randomized comparative trial, which found that rosemary essential oil was just as effective as minoxidil (the active ingredient in many commercial hair-growth products) for reversing hair loss caused by androgens—also known as male- or female-pattern baldness—after six months. 

Triple board-certified dermatologist Mamina Turegano, M.D. is just one expert to rave about the potent essential oil. "I recommend putting three to five drops into your shampoo before you use your shampoo," she says on TikTok, or you can massage a rosemary oil blend (like this one) into your scalp. Just make sure the formula you choose includes a carrier oil (this one has a base of maracuja, sacha inchi, and castor oil), as you never want to apply pure rosemary oil directly onto the scalp.