14 (Actually) Effective Products for Hair Growth, According to Amazon Reviews 

Number of customer reviews: 131,985

Customer review: “This Collagen is so easy to take. I pour the measuring cup full of it into my morning coffee & stir it up – there is NO taste. To work well, it needs to be Hydrolyzed Type I & III which this brand is! To get full benefits from it, you need to take it twice a day which I am now doing! I am happy with this product.”

Average rating: 4.6/5

Collagen supplements have been making waves in the wellness world for a while now, and according to nutritionists, they can play a role in hair and skin health. Due to collagen’s rising popularity, there are tons of formulas on the market, but this powder from Sports Research is the unanimous Amazon fave.

“My hair is growing insanely fast. How do I know this? Because I touch up my roots to cover grays, which I needed to do every four weeks (exactly) and now have to do it between two and three weeks. That is INSANE. There is also much more new hair that is now very noticeable,” explained one happy reviewer named Gavilan.

Number of customer reviews: 46,419

Customer review: “I am on my third bottle and I must say, these work. My hair is usually slow to grow, and before taking these, it would seem like my hair would reach a certain point then I’d have to trim it. With the gummies I have gained healthy length faster, and thickness.”

Average rating: 4.5/5

Despite the fact we have an initial eye-roll reaction when it comes to gummy supplements, according to the overwhelming surplus of positive Amazon reviews, these are some of the best products you can get your hands on for hair growth. They’re vegan, cruelty-free, and strategically formulated with essential nutrients starved strands crave like biotin, folic acid, and vitamin D.

“My hair was falling out in clumps and getting super thin in the front,” explained one reviewer Cyferguson. On the recommendation of my hairstylist, I ordered these gummies and now have tons of new hair growth. I’m so pleased, and they taste amazing. I have trouble limiting myself to the recommended dose!”

Number of customer reviews: 87,133

Customer review: “I love this thing! My scalp gets so dry and flakes. I have thick curly hair and I feel like I have to shampoo a lot more just to get rid of the flakes. I use this to wash my hair the other night and it felt so good in my scalp. Highly recommend.”

Average rating: 4.6/5

Almost every dermatologist I’ve ever chatted with about hair health has told me that scalp massage is one of the best things you can do to stimulate hair follicles for increased growth. This adorable, ultra-soft massaging shampoo brush is just the antidote you need. Reviewers say it also helps heal flakes, itchiness, tangles, and stress.

Number of customer reviews: 92,237

Customer review: “I bought this because a friend of mine swore by it and I am so glad I took her recommendation! I had gotten my hair cut short and it was about two inches shorter than I wanted it to be and my hair texture is wavy/curly and coarse, so I started taking these vitamins. My hair has grown much faster and I can’t even begin to tell you about my nails!”

Average rating: 4.6/5

Biotin and coconut oil are two of the most infamous ingredients when it comes to hair health. Thus, when the two come together in this epic hair growth product from Sports Research, it came as no surprise the results (and reviews!) are impressive.

“I started to see a difference in as little as 2 weeks!” exclaims Antoinette Castillo on Amazon. “My hair was no longer falling out as much in the shower, and I began to see baby hairs growing in where my hair was thinning. I’m glad to have found a product that actually works. Even other people are noticing that my hair is growing back which definitely gives me a confidence boost.”

Number of customer reviews: 80,180

Customer review: “I have had used this for 3 days. While it’s too soon for new eyebrows, I have noticed a big change in my eyelashes. The skin around my eyes looks so much brighter and healthier, and my mascara seems so much more impactful. My lashes seem plumper, and seem to draw the mascara in. It’s not flaky and crusty at the end of the day. My lashes look think, healthy and quite luxurious.”

Average rating: 4.4/5

Many experts we’ve talked to recommend castor oil to aid lash and eyebrow growth, but the word on Amazon is that the special oil can also work hair growth wonders on top of the scalp. (We also love that this formula is USDA-certified organic and cold-pressed!)

“I am now a fan of castor oil!” one Amazon reviewer practically shouts. “I’ve always read that castor oil was great for hair growth, so I decided to give it a try. I’ve been using it on my eyebrows, lashes, and on my hair (my hair is natural, extremely curly and colored), and in a month I can already tell a difference. My eyebrows seem much thicker, my hair is so soft, thick, and healthy. My lashes are looking thicker and longer. I also use this on my skin.”

Number of customer reviews: 16,159

Customer review: “So I am almost finished with my 2nd bottle of Hairfluence and I must say that my hair is growing like a weed! I normally color my hair black, because I am naturally gray, but I have not retouched with color because I am so shocked by how much my hair has grown, I want to see the process without coloring my hair. I’d say it’s grown between 1 inch. to 1.5 inches.”

Average rating: 4.1/5

Thanks to the team of hair experts at Hairfluence, this well-reviewed hair growth product contains not only superstar ingredient biotin but also a complete synergistic blend boasting a variety of essential vitamins, minerals, and amino acids that work together to ensure faster-growing and healthier hair.

“I finished my first bottle, and I’m ordering another one!” satisfied reviewer KristinaM confesses. “The most noticeable effect I noticed during the first month is not the hair growth but the reduction of hair loss. I lose about half the hair I used to lose in the shower since taking Hairfluence.”

Number of customer reviews: 39,020

Customer review: “This product works great on my hair! After the first few washes, there was no fallout left in the bottom of the shower. My hair grew thicker and stronger with every wash! It was not only a confidence boost, but also a life saver for my stressed hair!”

Average rating: 4.3/5

If you’re not into poppable supplements, a high-quality shampoo or topical formula can also do the trick. This one is maximum strength and contains TLC-gifting ingredients like biotin, provitamin B5, zinc, coconut oil, and other hair-healthy botanicals.

“Love this! I have thinning hair due to genetics and bariatric surgery; a huge amount of hair fall. Since using this shampoo, the hair fall has significantly decreased and I can feel stubblies (is that a word?) on top of my head,” a reviewer named Carol says.

Number of customer reviews: 50,223

Customer review: “This is the best supplement I’ve ever used for hair and nails! My hair has definitely less hair loss and my nails grow with lightening speed and don’t chip! It takes several months to see results but if you use patience you will be happily satisfied!”

Average rating: 4.6/5

Combining pivotal ingredients like a whopping 5000 MCG of biotin in addition to helpful side hustlers like vitamin C and other B vitamins, these coated caplets from Nature’s Bounty are a slam dunk for expedited hair growth.

“I have Systemic Lupus Erythematosus,” one Amazon reviewer disclosed. “Because of this disease, I have some hair loss, plus, thanks to all the biologic drugs I have to take, I had massive bald spots. My hair was falling out in the handfuls, so I was referred by a friend to take these vitamins. I started taking them and within two months had lots of new growth in my bald spots. I have continued to take the vitamins and my hair is full and beautiful.”

Number of customer reviews: 7,396

Customer review: “I am a breast cancer survivor in remission. I am thrilled to add this to my regimen for the regrowth of my hair. Thank you so much for this working formula! Glad to see my results,”

Average rating: 4.3/5

According to the experts at Propidren, one of the main factors in terms of hair loss is the production of dihydrotestosterone or DHT (and our research backed this up!). Thus, the brand set out to launch a product containing clinically proven DHT blockers that synergistically stop hair loss while encouraging regrowth and enhanced hair thickness.

Number of customer reviews: 2,728

Customer review: “100% works!! Warning, it does feel like an Icy-Hot on your scalp. The first time it was kind of a shock, but it hasn’t bothered me since, and it has definitely helped my hair grow double what it normally would. I usually use it every other day, and I’ll leave it on for about five minutes in the shower. It has definitely helped to heal the damage in my hair.”

Average rating: 4.4/5

Any product that reads “hair fertilizer” immediately piques our interest. Ideal for African American hair types, this deep conditioner is meant to heal hair that’s been damaged due to braiding, heat, and chemicals. Essentially, it utilizes key power players like proteins, vitamins, olive oil, shea butter, and oils from peppermint and sweet almond to treat and restore weak and brittle strands. Just look at the happy review for proof.

Number of customer reviews: 2,470

Customer review: “I have been wearing my hair natural for a year now. I trust Aroamas products, but when I find something that is exceptional, I have to rave about it. I started using this oil about three weeks ago. Since then, I have been religiously using it every night. I can tell the difference in the health of my scalp. It feels nourished and healthy and it is evidenced in the rapid growth of my hair. This is a definite keeper in my arsenal of products for natural hair.”

Average rating: 4.4/5

With all-natural and pure ingredients, this is one of the most beloved growth-promoting hair products on Amazon’s market. The formula includes castor oil, caffeine, rosemary oil, and biotin to infuse both scalp and strands with essential omega-6 fatty acids, minerals, proteins, and vitamin E.

Number of customer reviews: 6,400

Customer review: “I’ve been taking these for a couple months. I see A HUGE difference. Hair is extremely soft, I don’t shed nearly as much and my hair has grown faster then it ever has. My hair typically grows very slow. Super impressed and will keep purchasing this. Highly recommend. This product works!”

Average rating: 4.4/5

Whenever someone asks me about hair growth supplements, these tablets from Viviscal are the first to pop out of my mouth. I’ve talked to scores of hairstylists who recommend them (and whose A-list clients use them on the reg), and they helped rehab my hair after I struggled with an eating disorder in high school.

Number of customer reviews: 3,834

Customer review: “It’s been almost a month since I started taking these and I’m already noticing a difference in how healthy my hair looks and a difference in how much hair is coming off in my brush. As for hair growth I definitely can see a little improvement but it’s gonna take a few more bottles to see a drastic change.”

Average rating: 4.3/5

I love and swear by countless products from Hum Nutrition (specifically Flatter Me, $18 and Beauty Zzzz, $7), but these hair-boosting gummies are by far my fave, and I swear on my life to anyone who will listen that they’ve completely transformed my hair in the past year since I’ve started taking them. They taste great (but I recommend eating them with food because they contain zinc), and my hair has never looked so thick or grown so fast.

Number of customer reviews: 14,638

Customer review: “After 4 months I can really see and feel a difference. I’m not sure if my hair has filled in where it thinned however, it looks and feels thicker all over. That is exactly the claim they make on the bottle and it is 100% true for me. I’m Interested to see where I go from here. Again, it’s only been four months.”

Average rating: 4.3/5

By addressing multiple causes for thinning strands and poor hair health, Nutrofol has basically designed the holy-grail hair supplement that scientifically works to boost thickness, length, and overall hair happiness. Powered by plants and a bounty of nature’s best hair healers, the impressive ingredient list includes things like ashwagandha, saw palmetto, hydrolyzed collagen, tocotrienols (vitamin E), a special form of curcumin extracted from turmeric, among other antioxidants, vitamins, and minerals.