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Nioxin

Nioxin Diamax Hair Thickening Treatment, Instant Hair Fullness with Caffeine, Niacinamide & Panthenol

    • Based on 560 reviews
Condition: New
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$55.00 Why this price?

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  • – 6-month term
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This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Nov 27
Order within 15 hours and 13 minutes
Available payment plans shown during checkout

Style: Diamax Advanced


Product Dimensions ‏ : ‎ 2.25 x 2.36 x 6.89 inches; 5.61 Ounces


Item model number ‏ : ‎ 3


Manufacturer ‏ : ‎ Nioxin


Country of Origin ‏ : ‎ France


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Nov 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Worth every penny!!
Style: Diamax
Lives up to the description! This product does everything it promises. First use and you are sold! Thickens hair immediately. Highly recommend!!
Reviewed in the United States on November 20, 2022 by Amazon Customer
    • Nioxin thickining treatment while using Nioxin shampoo, conditioner and foaming treatment
Style: Diamax Advanced
The media could not be loaded. The box with shampoo, conditioner and treatment give directions. This 3D Diamax Fuller thicker hair instructs you to use the hair kit then put this on scalp just like the Nioxin serum that came with shampoo. It seams like it's too much for my hair so I don't use both in the same day. Great product. Acts differently if you don't use the serum. I do recommend you purchase if you have thinning hair ... show more
Reviewed in the United States on July 1, 2022 by christine limbers
    • WHOA! 😲 THIS STUFF WORKS!!!
Style: Diamax Advanced
My hair has always been very fine, but now that I'm almost 64 (and getting more grey but colored) I have REALLY noticed that it's also thinning! 😟 I started noticing that I was seeing my scalp... 😳 Ewwww! I started using this when I got it yesterday and OMG!!! 😯😃 It said that it's like having 11,000 more strands of hair... so I counted them! Yup! All 11,000 were there! 😆😆😆 But seriously... if you're having the problems I have had, and have tried EVERYTHING on the market to correct it... GET OFF THE FENCE WITH THIS! Yes, it's a bit spendy, but I'm sure it will last for months and I'm tickled pink with the results for SURE!!! ADDED BONUS: My hair looks like it did yesterday after sleeping on it all night! What? Does this stuff have 'memory' too? I wear my hair kinda short and sassy... kinda spiked up and lots of spray... LOVE THIS STUFF! Went in last night and purchased another one and sent to my sister as she is struggling with hair loss too! Might not actually grow it back, but you won't SEE the loss as much for sure! Get THIS! ... show more
Reviewed in the United States on February 24, 2022 by Te in MT
    • Look at that beautiful hair!
Style: Diamax
Long time fan of Nioxin products and the hair thickening treatment does not disappoint.
Reviewed in the United States on July 26, 2022 by Sally Brown
    • Nionin Diamax works
Style: Diamax
I have thinning hair and sides and top. Started using rhe Diamax ans started seeing new hair growth. I use it about 4 times a week and have 1/2 bottle left.
Reviewed in the United States on April 5, 2022 by Sunshine Lady
    • Thinning hair product
Style: Diamax
I have only been using this for a short time for thinning hair so I don’t know yet if it will really work. But, I apply it to my wet hair before blow drying and it does make my hair feel thicker without feeling sticky.
Reviewed in the United States on April 9, 2021 by Cherie
    • Yay!
Style: Diamax Advanced
It works! And, an added bonus, it helps tame an unruly wave in my bangs.
Reviewed in the United States on February 19, 2022 by Amazon Customer
    • Not as helpful as more affordable products
Style: Diamax Advanced
This treatment is twice as expensive as the Boldify and Aveda products, but not as effective. I had to try it though. So far, the Boldify is most effective.
Reviewed in the United States on August 19, 2022 by MagicSam

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