18 Best Hair Thickening Products For Thin, Weak Hair

Star rating: 4.1/5

What people are saying: “I started with the brow serum and it worked so well that I had to try the serum for my thinning hair. I didn’t tell anyone that I was using it, but when my grandma told me that she wishes she had thick hair like mine I figured that was the best testimonial it could get, because I have never had thick hair! And I’m only 3/4 of the way through my first bottle! I’m truly grateful for this stuff!”

Star rating: 4.3/5

What people are saying: “I’ve used other top-of-the-line hair support products for 15 years but nothing compares to this. I’d lost almost 1/2 of my hair after covid and this made my hair grow back freaky fast and healthy! It’s super soft, shiny and thick again. I’m going to take this exclusively from now on & not bother with the others.”

Star rating: 3.9/5

What people are saying: “I got this for my mom because she started losing her hair after local radiation and her hair has never looked better! She is so happy with it and her hairline is so much fuller now.”

Star rating: 3.9/5

What people are saying: “I expected this to either make my hair greasy or frizzy. When it worked great the first time I expected it to just last one day max. Then I thought ‘I’m ok, it’ll just last from wash to wash; not be cumulative.’ But my hair was fuller even when you just washed & dried without using the spray. And my thin, fine, color treated hair loves it! If you’re thinking of trying it Definitely do! I Highly Recommend this spray!!”

Star rating: 4.9/5

What people are saying: “I love this product for my thin hair! It gives some volume and it makes my hair look healthy! I use it every night, dry or wet and it doesn’t leave any grease unlike other thickening products. I also love the smell, it is light and fresh. I doesn’t irritate my scalp or make it drier. I just hope I can see changes for some hair growth, maybe if I continue to use it consistently.”

Star rating: 4.6/5

What people are saying: “I recently lost my edges due to low iron and braiding. After bringing my blood level up, I wanted to try something to grow my hair back. Within 2 months I noticed a change in my edges. My hairline is fuller. This is a MUST buy. My edges were very thin and braiding them made it worse. But using this changed my hairline life. It leaves a soothing feeling.”

Star rating: 4.3/5

What people are saying: “I've been using this product for almost 10 years, since the last time I transitioned back to natural waves. It mixes so well with curl products and other stylers, and it's good whether you leave your hair to air dry or heat style. It's so versatile and easy to use. Recommend!”

Star rating: 4.5/5

What people are saying: “My all-time favorite. I’m on my 4th bottle and the bottle itself lasts forever. I have bleached processed hair (balayage) and curl it practically everyday. I’ve noticed such a difference when I stopped using it bc I ran out. People notice the volume. It doesn’t weigh my hair down or make it feel like it has residue.”

Star rating: 4.2/5

What people are saying: “I have long hair down past my butt and it still gave my hair a good amount of lift and body. It is pretty darn pricey but already it works. It smells good and is easy to use. I'm going to try it again and curl my hair and see how it works with that.”

Star rating: 4/5

What people are saying: “I have thin, flat hair, tends toward greasy. This is a great shampoo for fullness and volume. Yes, you still need to style with volumizing products if you want major lift, but this is a great everyday (or every 3 days in my case) shampoo. It is not moisturizing — it is thickening. If you want moisture, use a moisturizing shampoo.”

Star rating: 3.9/5

What people are saying: “This product has been amazing for me. I’ve noticed a lot less shedding and my hair feels stronger. My scalp feels great. I apply it at night before bed, and I haven’t noticed too much of a crunchy feeling or residue. I daresay that my roots look thicker with new growth! I’ve been using the system with shampoo, conditioner, and the blow dry primer. I’ve always struggled with fine hair, but lately my shedding and texture has been a concern. I highly recommend this serum!”

Star rating: 4.2/5

What people are saying: “So far this product is helping with my hair thinning around my face for hair loss. I have new hair growth coming up. Looking a lot better. Good product so far.”

Star rating: 4.1/5

What people are saying: “Highly Recommend. I've used this for about 2 months now and I'm in Love. Works Great!! I will spray this in layers under my hair right before blow drying then using my diffuser high heat, low blow, pumps up my roots to give so much volume that lasts all day.”

Star rating: 4.3/5

What people are saying: “I have an extremely sensitive scalp! Almost everything breaks me out. This has been a godsend. It has a pleasant scent, easy to use pump, and creates a decent amount of leather. The price is great too. I highly recommend this product for anyone that sugfers skin irritation.”

Star rating: 4/5

What people are saying: “I was pretty skeptical but this actually does work. Pleasantly surprised. Would recommend. A bit pricey but worth the splurge.”

Star rating: 4.5/5

What people are saying: “I am really enjoying this product. I use it about twice a week before going to bed and when I wake up I shampoo my hair twice and condition once. This oil leaves my hair so soft and shiny. It’s not oily at all after I wash it all out! I’m not sure if my hair has grown much, but this product makes me want to oil and wash my hair every day!!”

Star rating: 4.7/5

What people are saying: “Thanks to age and medications my hair started to fall out more than normal. Thin, flat and weak looking was my new daily norm and I was devastated!! On a whim I decided to try the Intensive Spray and my hair is happy again!! After 2 weeks my hair looks full and I have a lot less breakage! It's a great option to have!”

Star rating: 4.4/5

What people are saying: “Gives so much volume to my thin curly hair. Smells delicious. I just reordered so I wouldn’t run out. I will be a lifelong customer as long as the product doesn’t change a thing.”