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We are Nioxin, the #1 professional hair care brand for thicker, fuller hair. We create scientifically proven products to care for your scalp and make your hair look and feel thicker and fuller.
Nioxin Density Defend Diaboost Hair Thickening Serum is a leave-in serum for fine hair. Designed for daily use, it instantly increases the diameter and thickness of hair from the root.
This professional hair treatment is formulated with innovative ingredients such as caffeine, peppermint oil and niacinamide . The combination of these ingredients stimulates and nourishes the hair follicles to prolong the growth cycle and improve the resistance of the hair fibers, achieving a more voluminous appearance.
This leave-in scalp serum from Nioxin helps regulate sebum production and control oiliness, as well as improve blood circulation and maintain the skin barrier. Apply 6 pumps evenly to the scalp, gently massage into the roots and comb through. Do not rinse. Apply to damp or dry hair.
For best results, use daily in conjunction with Nioxin Hair & Scalp Densifying System. Add to your personal care routine or give Nioxin Diaboost Density Defend Serum as the perfect beauty gift.
This serum increases the diameter of the hair, protects it against breakage and stimulates its growth with daily use.
The lists of ingredients contained in the composition of the products are updated regularly. Please check the list of ingredients on the packaging before using the product.
Brand Safety Warning
For external use only. In case of contact with eyes, rinse with water and keep out of reach of children.
I haven’t noticed any improvement, but I’m waiting.
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Gender: Woman
Age: Between 36 and 50 years old
Country: Belgium
Has been using this product for: Less than 6 months
Hair type:
Dry, Blonde
Solange recommends this product
Mar
Verified purchase
18/10/2025
Ideal for strengthening hair
Highly recommended! It works!
Translated by Google
Gender: Woman
Age: More than 50 years old
Country: España
Has been using this product for: Between 1 and 3 years
Hair type:
Oily
Mar recommends this product
Maria Inês
Verified purchase
24/03/2025
NIOXIN
IT WORKS VERY GOOD!!!
Translated by Google
Gender: Woman
Age: ---
Country: Portugal
Has been using this product for: Not specified
Hair type:
Oily
Maria Inês recommends this product
Sonia
07/06/2022
Okay
I expected better results but I've been using it for a short time, I hope it improves
Translated by Google
Gender: Woman
Age: Between 18 and 25 years old
Country: España
Has been using this product for: Less than 6 months
Hair type:
Oily, Blonde
Sonia recommends this product
Sonia
22/03/2022
Very effective
At home we have been testing it for several weeks and the results are effective. We also love the application system. In this way we do not waste any product.
Translated by Google
Gender: Woman
Age: ---
Country: España
Has been using this product for: Less than 6 months
Hair type:
Dry
Sonia recommends this product
Ana
14/03/2022
this product is great
I am using it daily and it is great my hair is recovering after everything that has been damaged and after the covi it fell out a lot, I recommend it to treat the problem you have.
Translated by Google
Gender: Woman
Age: ---
Country: España
Has been using this product for: Less than 6 months
Hair type:
Dry
Ana recommends this product
Ana
10/03/2022
New product in my hair routine
This product has made my fine and weakened hair become stronger and thicker, it makes my hair look more voluminous than it had lost due to dyes and irons. I know that as I use it more, it will improve even more until I can have my natural hair
Translated by Google
Gender: Woman
Age: Between 26 and 35 years old
Has been using this product for: Less than 6 months
Hair type:
Curly, Dyed hair, Hair highlights
Ana recommends this product
Pilar
06/03/2022
Professional products with results!
Lately I was suffering from quite severe hair loss, I saw how day by day when combing my hair I lost more and more hair. The first impression was very well professional products and very easy to apply. I have used it once a week and I notice that the hair is more voluminous and apparently healthier!
Translated by Google
Gender: Woman
Age: ---
Country: España
Has been using this product for: Less than 6 months
Hair type:
Dry
Pilar recommends this product
Varinia
01/03/2022
my new favorite
I have loved the product, the truth is that it has been a pleasant surprise, from its smell to its texture, everything is great and best of all, it fulfills what it promises, which is the most important point of all in my opinion. So, I really recommend it 100%, it will not disappoint you at any time since it fulfills everything it promises, since my hair has seen a great improvement, especially in the quantity and strength of it.
Translated by Google
Gender: Woman
Age: ---
Country: España
Has been using this product for: Less than 6 months
Hair type:
Dry
Varinia recommends this product
Nazaret
27/02/2022
Lion's Mane at 0,
I have been using this product since the beginning of February. At the first uses I have to say that I did not notice much, but the more I use it I begin to notice it because now every time I get out of the shower, I dry my hair and comb it I notice a lot of hair when I put it forward. Or not so much hair but it occupies more, before it was fallen and it seemed that it had 4 hairs, but it was so smooth and without volume, now the opposite. Of course I will continue to use it and take photos to see if I really see a change. PS: be careful with the diffuser, I think it's better to put it in your hand or very close to the root because the door was stained hahaha
Translated by Google
Gender: Woman
Age: ---
Country: España
Has been using this product for: Less than 6 months
Vegan
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