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💥 Unlock your hair’s full potential — thicker, stronger, unstoppable!
Nioxin Hair Thickening Serum with Diamax Advanced and HTX technology delivers visibly fuller, thicker hair for up to 8 hours by boosting individual strand diameter and protecting against breakage. Enriched with caffeine, panthenol, and niacinamide, it nourishes the scalp and strengthens hair roots, making it ideal for all hair types and daily use. Trusted by professionals and backed by 25+ years of expertise in thinning hair care.





































| ASIN | B086G3LFD1 |
| Best Sellers Rank | #11,673 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #182 in Hair Regrowth Treatments |
| Brand | NIOXIN |
| Brand Name | NIOXIN |
| Customer Reviews | 4.4 out of 5 stars 1,061 Reviews |
| Hair Type | All |
| Item Form | Serum |
| Item Volume | 0.34 Fluid Ounces |
| Item Weight | 3.4 Ounces |
| Manufacturer | Nioxin |
| Manufacturer Part Number | 3614228816113 |
| Model Number | 3614228816113 |
| Number of Items | 1 |
| Recommended Uses For Product | Professional Salon & Spa |
| Scent | Unscented |
| Scent Name | Unscented |
| Unit Count | 3.38 Ounce |
A**R
This works!!! Worth every penny!
My hair is thinning badly due to low iron and a 100lb glp-1 weight loss. It has been a very depressing time. My hairdresser said a lot of her clients were having luck with this - and WOW! It’s amazing. My hair feels healthier and is definitely thicker, enabling me to style it to cover the thin or bald areas. Combined with a Nutrafal regimen, I have had real growth and am finally feeling better about myself. Give it a try if you suffer with hair loss like me!
J**.
Great value
If you already love this product, buying it this way is a great value. Having it delivered right to your door is incredibly convenient. I’ve noticed that it seems to support healthier hair overall — helping with breakage and making my hair feel stronger. It also appears to promote better growth by supporting the hair at the root. Overall, a convenient and cost-effective way to keep this staple on hand.
D**H
Works, but
Does help with making hair look fuller and thicker. But does dry my hair out. I’ve stopped using it because I don’t think the chemicals are doing my hair any good.
A**R
Works great so far
I’ve had these two itchy spots for almost 2 years and thinning. Dermatologist prescribed a 200$ cream that doesn’t work. This stopped the itching the in first use. It’s not greasy, very light and doesn’t burn. Great quality though I wish it was a little cheaper. Either way, it works and I’m happy! I’ll come back to update if the hair thickens
A**A
In love!!
I started using Nioxin Diamax Hair Thickening Treatment, and I couldn't be more impressed! As someone with fine hair that tends to fall flat, I've tried numerous products, but this one truly stands out. First, the application process is straightforward. The lightweight formula absorbs quickly, and I love that I can apply it to towel-dried hair without any heavy residue. After just one use, I noticed an immediate difference in volume and thickness. My hair looked fuller and felt healthier, which is a huge confidence booster! I've been using it consistently for a few weeks now, and the results have only gotten better. My hair not only looks thicker but also feels stronger. Plus, I love that it doesn't weigh my hair down or make it greasy. If you're struggling with fine or thinning hair, I highly recommend giving Nioxin Diamax a try. It's become a staple in my hair care routine, and I can't imagine going without it now!
K**R
It does just what they said it would!!!
This stuff actually works like magic. It made my hair look 3 or 4 times thicker and I loved it!!! However, it takes a lot for me and it is pretty expensive for 3.3 oz. I will still use it though, but not use so much. I will probably save it for special occasions.
D**1
Styling product or hair treatment?
Is this a hair treatment or a styling product? The product description makes it ambiguous. As a styling spray it does thicken my hair. As a treatment, I haven’t seen any difference. This is expensive for a hair styling product. You can find a similar product from a salon brand for less than this. And it’s non-returnable.
H**R
Great product for thinning hair
I have thinning hair on top due to aging. This Nioxin just adds strength and depth to my hair. I love it! I have been using for many years.
B**.
This works
It's a great product. I find it really works. It's unscented. My hair is thicker. I would definitely buy this again. Update...it's full of caffeine which I am allergic to. Made me very ill. Buyer beware. There should be a warning ⚠️ on the label!!!
P**K
Works great
I bought it for my postpartum hair loss. My hair were falling out like crazy but after using this product it stopped and I actually have lots of baby hair. I thought the product will be oily but it is more like just a liquid and it doesnt leave hair greesy.
M**A
Good product but expensive
Price is too much. But it helps. It is not comparable to head and shoulders tonic but unfortunately it is discounted.
M**A
Nioxin Hair Thickening Serum
I really like this serum that makes my hair look and feel thicker. The instruction says to use it on wet hair. I don’t. I use it on my freshly shampooed hair. I work the serum into my hair using my scrubby brush. I comb my hair and use my hot air brush to style my thick feeling hair.
V**Y
Smells horrible
This product arrived broken and smells soooo strong and bad like rubbing alcohol! It isn’t eligible for return so that’s just my money in the garbage . I wish I could give it negative stars. It’s a no for me.
Trustpilot
5 days ago
3 days ago