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Nioxin Density Defend Diamax Advanced Serum is a 3.38 fl oz hair thickening treatment designed to visibly boost hair diameter and fullness. Powered by caffeine, niacinamide, and panthenol, it strengthens strands, nourishes the scalp, and reduces breakage. Suitable for all hair types, this serum supports healthier, thicker-looking hair with daily use.













| ASIN | B086G3LFD1 |
| ASIN | B086G3LFD1 |
| Best Sellers Rank | #21,221 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #167 in Hair Regrowth Treatments |
| Brand Name | NIOXIN |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,011) |
| Hair Type | All |
| Item Form | Serum |
| Item Volume | 0.34 Fluid Ounces |
| Item Weight | 3.4 Ounces |
| Item model number | 3614228816113 |
| Liquid Volume | 3.4 Fluid Ounces |
| Manufacturer | Nioxin |
| Manufacturer | Nioxin |
| Number of Items | 1 |
| Product Benefits | With ingredients like caffeine & niacinamide, Diamax thickens the hair at the roots and protects against breakage. |
| Product Dimensions | 2.25 x 2.36 x 6.89 inches; 3.4 ounces |
| Scent Name | Unscented |
| Unit Count | 3.38 Ounce |
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.
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!
T**S
Great product
I love this product. Makes my hair feel thick, smooth and shiny.
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.
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
B**R
NOT WORKING
I am using it regularly for 1and 1/ month and experienced much worse result than at the beginning. I use a comb with the 1/4 inch between the Thees and still there are hair I am still left. I am sorry it is too late to return but HOW YOU CAN KNOW if it is helping or not in the time less than a month
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**E
Really works!
I have been using this product for about 2 years. It works so well on my thin hair. I can visibly see a "hair plump" when using vs not using. I continue to buy an use this as I have very thin hair. I have tried other products that promise to provide a thickening agent. I have yet to come across something similar. You will not be disappointed!
B**.
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!!!
M**A
I have oily hair and the best thing about this serum is that it does not make hair oily and can be used everyday; it has a good influence on hair; now I am repeating it.
M**A
Price is too much. But it helps. It is not comparable to head and shoulders tonic but unfortunately it is discounted.
M**A
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.
C**U
Parfait pour mes cheveux post-partum! J’ai vu une amélioration de la pousse de mes cheveux en peu de temps ! Je recommande!
Trustpilot
1 month ago
3 weeks ago