20 Best Hair-Thickening Products For A Fuller Looking Mane

While some may have luscious, thick hair without even trying, many of us need to put in a lot of work to keep our tresses healthy and strong. If you're struggling with thin, flat locks, there could be a variety of causes — hormones, genetics, medication, stress, and some hair treatments can contribute (via Mayo Clinic). Of course, if you're experiencing sudden and unexplained hair loss, it's always best to go to a dermatologist for their opinion. 

However, if your mane is primarily healthy but you want more thickness and volume, there are many different hair-thickening products to choose from to achieve that. With the right items you won't just temporarily create the illusion of more hair, some of them will also help it grow stronger so that you don't even have to think about volume. We've rounded up 20 hair-thickening products that will give you results regardless of whether you're willing to splurge or sticking to a budget.

We decided to cover the most common product categories that people use for haircare, such as shampoos, conditioners, leave-in treatments, serums, and sprays. For most of the categories we picked, we made sure to find a cheaper and more expensive option so that every pocket can find a way to thicker hair. The price range of the items is from $4 to $80. Of course, there is no need for you to use a product from each category to achieve thicker hair — each on their own should make a difference. However, combining two or three (for example, a shampoo, a scalp serum, and a texture spray) is bound to give you even more visible results in less time.

To pick the 20 best hair-thickening products, we looked at buyer reviews, expert opinions, ingredient lists, as well as what the brands said about the items themselves. We also considered social media trends, which is why you might recognize the last category from TikTok (if you spend countless hours on it as we do).

With plenty of hair-thickening shampoos on the market, it isn't easy to know which one actually works. The best way to pick your favorite one is to check the ingredient list. The OGX Thick & Full + Biotin & Collagen Volumizing Shampoo is one with plenty of good reviews and a great price point. Lacking collagen naturally can cause the hair to thin and break, so choosing a shampoo containing it is an excellent choice for thickening and volume. A satisfied buyer says, "When applying, leave [the] shampoo on for a minute or more to let it be absorbed by [the] hair ... The results are remarkable." This product also contains biotin, a form of vitamin B, also known to help keep hair healthy.

Buy OGX Thick & Full + Biotin & Collagen Volumizing Shampoo on Amazon for $7.

If you're looking for a more high-end hair-thickening shampoo, you should try Oribe's Shampoo for Magnificent Volume. "Best volume shampoo on the market. Changes the texture of the hair. Lifts from roots to tip. No joke. I know Oribe has a high price point — but their products are just unreal," a happy buyer raves in their review on Oribe. The brand recommends allowing the shampoo to sit in your hair for at least one minute before rinsing it out.

Purchase Oribe Shampoo for Magnificent Volume on Oribe for $46.

The L'Oréal Paris EverStrong Sulfate-Free Thickening Conditioner — which uses the power of rosemary leaf — is a great drugstore conditioner that will thicken the appearance of your hair and strengthen it. However, those who tried it out seem to have noticed a difference pretty quickly. "I have fine, thinning hair. This product really makes my hair fuller. It doesn't have awful perfume smell either. My hair is soft yet feels thicker," a customer confirms on Amazon.

Buy L'Oréal Paris EverStrong Thickening Sulfate Free Conditioner at Walmart for $8.

The Kérastase Densifique Fondant Densité Conditioner is on the pricier side but according to those who have tried it, splurging on it is definitely worth it. A reviewer says, "I have very fine and thinning hair. I've tried so many products and wasted so much money on products that did absolutely nothing. This stuff really works. I've never been a fan of conditioner because it tends to weigh my hair down but my stylist told me to use the conditioner first and then shampoo it. You still get all the benefits of the conditioner but you don't get any added weight. Works great for me." The key ingredients in the conditioner are hyaluronic acid and intra-cylane minerals — both of which strengthen the hair and help prevent breakage.

Purchase Kérastase Densifique Fondant Densité Conditioner on Amazon for $37.

Those looking for a drugstore hair-thickening leave-in treatment should try Pantene's Nutrient Blends Bamboo Hair Volumizer Thickness Multiplier. "I really love this product for my thinning white hair! It works nicely without leaving any residue feeling in my hair. Works on wet or dry hair. And I've used it both ways," a happy customer raves in a review on Amazon. According to Pantene, the leave-in treatment was made with bamboo root and it gives immediate results.

Buy Pantene Nutrient Blends Bamboo Hair Volumizer Thickness Multiplier Leave-In Treatment at Walmart for $7.

The Nioxin Diamax Hair Thickening Treatment has become a cult classic over the years. Those with thin hair have witnessed remarkable results by using it. "This hair thickening treatment works to improve hair fullness by increasing the thickness and diameter of the hair," dermatologist Marisa Garshick, M.D., tells Real Simple. The expert adds that the product uses HTX technology that combines caffeine, niacinamide, and panthenol to give your hair thickness and strength. The brand recommends using the treatment daily for the best results.

Purchase Nioxin Diamax Hair Thickening Treatment on Ulta for $45.

A serum that does wonders for hair density at a reasonable price is the Bellisso Biotin Hair Growth Serum. It contains biotin, sunflower, evening primrose, and lavender oils. As of writing, it has over 4.3 out of 5 stars on Amazon (from over 1,800 reviews). "As a cosmetology student and someone who's obsessed with all things haircare, I've had my fair share of expensive hair oils that are just greasy and weigh down your hair while having no ingredients that will help your hair long term. This stuff is my new holy grail and will forever be in my haircare kit," a buyer raves about it in a review.

Buy Bellisso Biotin Serum for Hair Growth on Amazon for $15.

According to Vegamour, their Gro Hair Serum for Thinning Hair increases hair density and reduces shedding — with results visible in 90 days. Those who have tried the serum rave about its efficiency. "I've only been using Gro for three months and already have amazing results! I had severe postpartum hair loss. My thinning areas haven't filled in completely yet, but if I've had this much success in only three months, I can't wait to see it at the six-month mark," a buyer writes on the Sephora website.

Purchase Vegamour Gro Hair Serum for Thinning Hair on Sephora for $58.

Over the years The Inkey List has established itself as a brand that produces high-quality products that are not overpriced. According to the label, their Peptide Volumizing Hair Treatment can help with increasing the volume and thickness of the hair. Peptides can result in follicular enlargement, which in turn results in thicker locks (via National Library of Medicine). A happy buyer confirms the serum provides results, saying, "On my second bottle — this product really works, makes hair fuller with no sticky feeling."

Buy The Inkey List Peptide Volumizing Hair Treatment on The Inkey List for $13.

If you want to splurge on a peptide serum, consider getting the Chämpo Pitta Growth Serum. According to the brand, the serum contains growth-enhancing ingredients like caffeine, creatine amino acid, and ayurvedic haritaki extract. "I was pretty skeptical when I purchased this, but after reading some positive reviews, I thought I would give it a try. My hair was an absolute mess. Within a few uses, there has been a huge difference in my hair loss, and my hair feels so much softer," a reviewer says.

Purchase Chämpo Pitta Growth Serum at Champo Haircare for $48.

Those who feel shampoos, conditioners, and leave-in treatments aren't helping can try a minoxidil product. "Minoxidil is an easy-to-use topical treatment that stimulates blood flow to stop thinning while promoting newer and thicker growth," dermatologist and founder of Facet Dermatology, Geeta Yadav, M.D., tells Real Simple. "When using minoxidil, it's critical to get the product directly onto the scalp for it to work, so I recommend parting the hair in several places and massaging it in." A great minoxidil to try out is the Keeps Minoxidil Topical Solution 5% which should be applied to the scalp twice a day. "I was losing my hair in the front, so I started using Keeps and saw a difference within weeks. I like the texture too; it leaves the hair more voluminous," says a satisfied buyer.

Buy Keeps Minoxidil Topical Solution 5% on Amazon for $33.

A thickening spray can take your hair from fine and flat to thick and voluminous in a matter of minutes. If you're looking for a drugstore hair-thickening spray, Garnier Fructis Style Mega Full Thickening Lotion for All Hair Types is a great choice. "I'm impressed with this product. It does a nice job of adding fullness to my thinning hair, and the price is certainly right," a happy customer writes in a review.

Purchase Garnier Fructis Style Mega Full Thickening Lotion for All Hair Types on Amazon for $4.

A slightly more expensive thickening spray with 4.3 out of 5 stars on Amazon (from over 19,000 buyer reviews) is the Boldify Hair Thickening Spray. According to the product's description, you will get thicker and more voluminous hair in only 60 seconds. Sounds too good to be true? Well, numerous reviewers claim it works! One customer says, "I have very fine and limp blonde hair, and I've tried other volumizing products that didn't impress me. Boldify caught my eye, and I gave it a shot after grappling with the price for a while in my head. Totally worth it. Definitely follow the directions because it makes a difference.

Buy Boldify Hair Thickening Spray on Amazon for $24.

The TRESemmé Dry Texture Finishing Mist Spray For Flat Hair is another budget-friendly product that does wonders when it comes to hair volume. TRESemmé claims a few spritzes will provide a natural look. A satisfied buyer raves, "Better than some more expensive brands. It actually helped my hair stay awesome for two whole days."

Purchase TRESemmé Dry Texture Finishing Mist Spray For Flat Hair at Target for $7.

A more expensive, but worth-every-penny, thickening hairspray is the R+Co Balloon Dry Volume Spray. "Absolutely can't live without this. Gives my fine hair volume and texture... a win-win," says a satisfied buyer. The key ingredients of this spray are silica (for grit and dryness), zeolite (for volume), calendula (for hydration), styling polymers (for flexible hold), and mica (for shine).

Buy R+Co Balloon Dry Volume Spray at R+Co for $36.

If you're looking for a hair filler to give you the illusion of thickness, Toppik's Hair Filler is a great choice. One reviewer raves,"I use this product daily. I have thinning hair right in front, which I feel is embarrassing. I just sprinkle [it] on the top of my hair ... It's also good trying to cover up gray." While there are much more expensive hair fillers, this one — which comes in four shades — has become very popular for a reason.

Purchase Toppik Hair Filler on Ulta for $15.

Apart from shampoos, conditioners, and different hair treatments, if you're trying to have thicker hair, consider buying a scalp massager. You can use the product while shampooing and conditioning your hair, or you can massage your scalp with it after you apply serums or oils to it. A great budget-friendly option is the Maxsoft Hair Scalp Massager Shampoo Brush. "It is great for using in the shower! I have noticed that my hair doesn't fall out as much outside the shower. I started to massage my hair in the shower while using the shampoo. Love it," one buyer says.

Buy the Maxsoft Hair Scalp Massager Shampoo Brush on Amazon for $8.

If you want to invest in a scalp massager that does everything on its own, the Comfier Cordless Hair Scalp Massager is a great option. According to the brand, the product has four massage heads, 21 individual nodes rotating both clockwise and counter-clockwise. It will surely make scalp massage that much more luxurious. "I'm so glad I trusted the reviews. This is the best massager I've found so far. It is easy to use and gentle and soothing to the scalp. I bought it for my scalp, but a plus [is] that it can be used on your whole body," says a happy customer.

Purchase Comfier Cordless Hair Scalp Massager on Amazon for $42.

Another thing you could consider adding to your haircare routine is taking hair growth supplements. "When seeking out a hair growth supplement, you want to consider clinically effective, medical-grade ingredients," dermatologist Dr. Kim Nichols tells Marie Claire. "The best ingredients for hair growth include B vitamins, vitamin D, vitamin E, vitamin C, zinc, and iron." A popular choice for under $20 is the Love Beauty And Planet Berry Extraordinary Gummy Vitamins for Strong Hair & Nails. According to the brand, the gummies contain biotin, folic acid, and vitamin D to help you grow strong and healthy hair. "I've tried at least six brands over the last few years looking for something that works for my thinning hair. Nothing did until I found these, and they're the only ones I'll buy from now on," a satisfied reviewer writes on Amazon.

But Love Beauty And Planet Berry Extraordinary Gummy Vitamins for Strong Hair & Nails at Walmart for $19.

If you are willing to spend a little more money, buy the Nutrafol Women Hair Growth Supplement. "I have taken Nutrafol for about six months now, and am very happy with the changes I've seen since about three-four months in," a buyer writes on Amazon. The brand designed the supplement for women aged 18 to 44 who have thinning hair. They even offer a subscription to make sure you don't miss any days. According to a study by National Library of Medicine, this supplement "resulted in a significant increase in the number of terminal (thick) and vellus (fine) hair."

Purchase Nutrafol Women Hair Growth Supplement on Nutrafol for $79.