Quick Facts

Nioxin Diamax thickening serum increases the diameter of each existing hair strand for thicker fuller looking hair.


✓ Increases hair thickness

Nioxin is one of the most popular brands known for hair loss products. Many people are familiar with their shampoo/cleanser line, but the company also offers a hair thickening product called Nioxin diamax thickening xtrafusion treatment.

According to the company website, this thickening serum provides 3 main benefits for people with fine hair:

  1. Increasing each hair strand’s diameter
  2. Making hair fuller and more manageable
  3. Strengthening hair resilience

Nioxin Diamax Thickening Xtrafusion treatment reviews

Thickening serums are nothing new. There are hundreds of brands offering similar versions of thickening hair products for fine and thin hair. In this section, we will cover some positive and negative points about Nioxin’s thickening Xtrafusion treatment:


Most people (especially women) who use this Nioxin hair thickener have either fine or thinning hair. They usually apply five to eight pumps of Diamax on their hair (including the scalp area). Quite a number of those users have noticed more volume in their hair and observed their hair feeling much thicker and fuller (which is what this hair thickening treatment promises as one of the main benefits). Also, the product does not leave hair greasy or weigh it down.


For the negative customer reviews, some people do not believe that this Nioxin hair serum makes any difference in terms of hair thickness before and after using it. Some people also mentioned that the product made their scalps dry or irritated as a side effect.

Even celebrities are regularly using it

Quite a number of celebrities (both women and men) including Vanessa Lachey and Vanessa Minnillo talked about the Nioxin diamax thickening xtrafusuion treatment as their key hair secret for fuller hair. In case for Vanessa Lachey, she reviews that “I started using diamax daily in September and instantly noticed a difference.” According to US Weekly.

How is your experience with Nioxin Diamax? Please share in the comment.

1 Comment

  1. This product made my scalp so dry and I got horrible dandruff after using it for about a week or so. Also I don’t understand why the price is so high? You can get other hair thickening products much cheaper.

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