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Rating: 4.4Based on 12 reviews
  • Most helpful positive

    Maja

    The post was made 2 days
    Rating: 4 out of 5

    Good Supplement

    This serum is a good supplement to the rest of the line, which helps strengthen the hair and provide more fullness and volume. I find that this serum is incredibly easy to apply and work with, it gives the promised fullness/volume, but without greasiness, weighing the hair down, or making it look stiff or flat. Very ideal to use when you want to style your hair and have more fullness! It has, like the rest of the line, a fresh and citrusy scent 🍋⭐️ I participated as a test person via Smartson and received a test product at no cost.
    121 views

  • Anna Magdalena

    The post was made 5 hours
    Rating: 4 out of 5

    Very light and fresh

    Experiencing full hair and it doesn't weigh down, which is very good since I have thin/fine hair. Also makes the hair easier to style. The review was conducted on behalf of Smartson - the test pilot was allowed to try the product for free.
    3 views

  • Emma

    The post was made 12 hours
    Rating: 4 out of 5

    Perfect for thin/fine hair!

    I have previously tried serums from other brands, and while it’s hard to see any difference in a short time, you quickly get a feeling, especially when you have thinner hair that easily gets weighed down. I have never experienced this serum leaving any traces or product feel on the scalp. If anything, the scalp feels even “fresher” after use, and I feel like I’ve lost less hair since I started using this. Additionally, it gives a nice lift and volume. Looking forward to continuing to use it and see what the results can be in the long run! 🚿 The review was conducted on behalf of Smartson - the test pilot was allowed to try the product for free.
    41 views

  • Oink_8_

    The post was made 1 day
    Rating: 4 out of 5

    Hair feels stronger

    After washing my hair with shampoo and conditioner from the same series and towel-drying it, I use the small treatment spray. I quickly found out that it's beneficial to comb the hair before I start spraying. This way, I can better section the hair, ensuring that I distribute the product evenly at the hair roots/scalp. You shouldn't be nervous about using a good amount of spray - the hair won't look greasy because of it. The spray has no particular scent, so the hair retains the lovely fragrance of the shampoo I used earlier. When the hair dries, it feels a bit stiff, but after combing it through, the stiffness disappears and is replaced by a feeling of slightly stronger hair strands. The review was conducted on behalf of Smartson - the test pilot tried the product for free.
    57 views

  • aye

    The post was made 2 days
    Rating: 5 out of 5

    Awesome serum

    The serum is light in consistency and doesn't feel heavy in the hair. I use a small amount in the lengths after washing and think it makes the hair softer and shinier. It also helps to reduce frizz and makes the hair look more well-groomed. I like that it doesn't make the hair greasy or heavy, but just gives a light and soft feel. It's a great finishing product in the routine.
    39 views

  • j.n.hansen

    The post was made 2 days
    Rating: 4 out of 5

    Lovely serum

    I have tried this serum in my fine Scandinavian hair. It is easy to use and feels light in the hair. Mild scent. My hair shines and looks more well-groomed and healthy. The review was conducted on behalf of Smartson - the test pilot tried the product for free.
    49 views

  • Mikaela

    The post was made 2 days
    Rating: 5 out of 5

    Fantastic!

    I have very thin, fine Scandinavian hair and have also lost a lot of hair over a longer period. Therefore, I was incredibly excited to try this series from Redken, and it has truly delivered! The series not only makes my hair incredibly fresh and shiny but also strengthens my thin hair. The spray smells as good as the rest of the series and makes my hair shiny, voluminous, and it feels very moisturized. I feel like I’m losing significantly less hair than before both when washing and brushing. So I can’t do anything but recommend it! The review was conducted on behalf of Smartson – the test pilot tried the product for free.
    41 views

  • begget

    The post was made 3 days
    Rating: 4 out of 5

    Good supplement to shampoo

    I have tested the Redken Acidic Grow Full System Treatment, and overall it is a good supplement to the shampoo and conditioner from the same series. The treatment is designed to care for the scalp and strengthen the hair, making it feel fuller and healthier. It contains ingredients such as Aminexil, vitamins, and nourishing substances that help strengthen the hair from root to tip. The product has a light consistency that is easy to apply to the scalp, and it absorbs quickly without making the hair greasy. The scent is fresh and citrusy like the rest of the series, which gives a clean and pleasant feeling after use. After some time of use, I noticed that my hair felt a bit stronger and looked fuller. However, it is important to be realistic – the treatment does not necessarily make new hair grow, but it can help strengthen the hair and reduce breakage, making the hair appear thicker and healthier. Overall, it is a good treatment, especially if you are already using the rest of the series and want a little extra care for your scalp and hair. The review was conducted on behalf of Smartson – the test pilot tried the product for free.
    116 views

  • Maja

    The post was made 4 days
    Rating: 5 out of 5

    Definitely recommended

    I have fine and thin hair, so I was very curious to test this serum. I find that it is light in consistency and easy to distribute on the scalp without making the hair greasy or heavy. This is something I really appreciate, as my hair can otherwise quickly look flat. After using it for a while, I feel that my hair feels fuller and has more life. I also notice that I lose a little less hair when brushing than before. All in all, a product that works well for thin hair. The review was conducted on behalf of Smartson – the test pilot tried the product for free.
    68 views

  • Jenny

    The post was made 5 days
    Rating: 5 out of 5

    Scalp & Hair Serum for Thin or Flat Hair

    I tested the Redken Acidic Grow Full System Scalp & Hair Serum for Thin or Flat Hair 100 ml and was pleasantly surprised by how light and pleasant the product feels in the hair. The serum has a very light consistency, almost like a thin serum or a light liquid, which makes it easy to apply directly to the scalp. It absorbs quickly and leaves no sticky or greasy feeling, something I really appreciate since my hair can easily feel heavy from the wrong products. When I massage the serum in, my scalp feels instantly fresh and hydrated. It gives a lovely feeling without weighing the hair down. I also notice that my hair gets a bit more lift at the roots and feels airier after styling. After using the product for a while, I feel that my hair is stronger and healthier. It looks fuller and is easier to style, which is a big plus for me as I sometimes feel that my hair can feel flat. In summary, this is a very nice serum that gives a fresh feeling to the scalp and helps the hair feel a bit fuller and stronger. It is easy to use in everyday life and is great for those with thin or flat hair who want to give their hair a little extra care. The review was conducted on behalf of Smartson - the test pilot was allowed to try the product for free.
    41 views

  • Ella

    The post was made 5 days
    Rating: 4 out of 5

    😍😍😍

    The serum feels light on the scalp and doesn't make the hair greasy, which I think other serums can feel like. It's easy to apply and gives a fresh feeling on the scalp. The whole series makes it feel like I've been to the hairdresser😍
    48 views

RedkenAcidic Grow Full SystemScalp & Hair Serum for Thin or Flat Hair 100 ml

470 kr*
Rec. price 570 kr
Free delivery option available, can be sent immediately
* Cannot be combined with discount codes.

From the brand that champions Advanced pH Science, new to Redken haircare Acidic Grow Full System Scalp & Hair Serum, with Azelaic Acid.

A lightweight leave-in spray serum that absorbs effortlessly, instantly leaving the scalp feeling hydrated, nourished, and healthy with a revitalized appearance. Suitable for all hair types, it provides the hair with added volume

Immediately after using:
• Scalp looks & feels healthy, hydrated, nourished.
• Hair is manageable and easy to style.
• Hair looks & feels smooth, soft, healthy, nourished/conditioned.
• Hair is not greasy, nor weighed down.
• 2x stronger hair*.

*Consumer use study with 68 individuals using shampoo + conditioner + serum vs. non-conditioning shampoo


How to Use:

Apply away from the scalp on clean, damp hair. Massage into scalp. Can be applied daily on dry scalp.

100 ml
  • Category:Serum

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