Redken
Acidic Grow Full System Scalp & Hair Serum

Acidic Grow Full System Scalp & Hair Serum is rated 4.3 out of 5 by 119.
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Acidic Grow Full System Scalp & Hair Serum
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3.4 oz.
#E4538600
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What It Is

Redken Acidic Grow Full System Scalp & Hair Serum is a lightweight and formulated with azelaic acid and a 5% strength complex of Caffeine + Prebiotics to rebalance the scalp with moisture, promotingvisibly healthy-looking hair.

What It Does

• Break-free: See the fullness of up to +5,000 hair fibers*

• Scalp is instantly blanced out with moisture

• Delivers instant root-lift for volume

• Provides 2x stronger hair**

• Lightweight and fast-absorbing, non greasy formula and finish

 

*reduced breakage from brushing with system of shampoo + conditioner + serum + spray vs non-conditioning shampoo

**with system of shampoo + conditioner + serum + spray

What Else You Need to Know

The Acidic Grow Full Density & Strength System provides a healthier feeling scalp that is balanced with moisture* and instantly thicker, fuller looking hair that is 2x stronger**

 

*shampoo + conditioner + serum + spray vs unwashed hair

** shampoo + conditioner + serum + spray vs non-conditioning shampoo

Spray half an inch away from the scalp on clean, damp hair. Massage into scalp.

AQUA / WATER / EAU • GLYCERIN • HYDROXYETHYLPIPERAZINE ETHANE SULFONIC ACID • CAFFEINE • PEG-40 HYDROGENATED CASTOR OIL • SODIUM HYALURONATE • PHENOXYETHANOL • CITRIC ACID • BIFIDA FERMENT LYSATE • SACCHAROMYCES/RICE FERMENT FILTRATE • CHLORPHENESIN • PROPYLENE GLYCOL • PARFUM / FRAGRANCE • TETRASODIUM GLUTAMATE DIACETATE • PENTYLENE GLYCOL • AZELAIC ACID • LINALYL ACETATE • CARVONE • LINALOOL • LIMONENE • CITRUS LIMON PEEL OIL • CITRUS AURANTIUM BERGAMIA PEEL OIL • SODIUM BENZOATE • CITRAL • CITRUS AURANTIUM PEEL OIL • PINENE

Purchases made in SalonCentric stores may be returned to any SalonCentric store. Purchases made through SalonCentric Customer Service, SalonCentric Business Partners, and SalonCentric.com orders Sold and Shipped by SalonCentric may be returned to a SalonCentric store; however, the return must not exceed $450 and must include the original receipt, packing slip, or invoice. For returns in-store of online orders, the refund will be credited back to the original payment method once the return has been processed. For SalonCentric.com Online Exclusive orders sold and shipped by third-party sellers, please see more details linked below for return steps.

The SalonCentric return policy does not currently apply to Kérastase & Shu Uemura purchases. Kérastase & Shu Uemura do not accept returns.

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Rated 5 out of 5 by from Acidic grow system scalp and hair serum I have thin flat roots and serum help my scalp and hair a lot. My hair feels thicker and more dense and it doesn't irritate my scalp at all. I have had let fallout.
Date published: 2026-03-12
Rated 3 out of 5 by from Didn’t see results This left my scalp a little dry and itchy and I didn’t notice any significant results
Date published: 2026-03-12
Rated 5 out of 5 by from Love this whole line! This whole line of acidic grow system is fantastic! It leaves the hair feeling super clean and the smell is great. I did notice that my hair felt more dense after using. I recommend this to many of my clients now.
Date published: 2026-03-12
Rated 5 out of 5 by from I like it I used this product as part of the system and I have found that it hydrates your scalp while giving body and shine.
Date published: 2026-03-12
Rated 3 out of 5 by from Not a fan so far. Eh. I’m still in the early stages of trying this but so far it just seems kind of heavy.
Date published: 2026-03-11
Rated 5 out of 5 by from Great product Fantastic! My hair feels thicker and fuller Smells nice and doesn’t feel sticky
Date published: 2026-03-11
Rated 5 out of 5 by from great scalp & hair serum [Employee of saloncentric] This is a great product. Love the whole Acidic grow full system. this scalp and hair serum is light and easy to apply not greasey at all. this whole line has a great fresh and light smell. Great line of products definitely recommend.
Date published: 2026-03-11
Rated 4 out of 5 by from Works great Works great with its group. I did feel like the set gave me more fullness.
Date published: 2026-03-11
Rated 4 out of 5 by from Thicker hair This whole line is unique in color, smell and use. I only used it about 1 week before writing this review and found my hair felt a lot thicker. The smell was almost a manly smell, but was quite nice. The color of the bottles make them stand out and are very pretty.
Date published: 2026-03-11
Rated 4 out of 5 by from Thicker Hair For Sure! I was super excited to receive this product line because I had one specific client in mind when it arrived. She is suffering from some situational alopecia due to anesthesia. I was intrigued with this spray serum but the directions were unclear if it was to also be used with the scalp mist. So I did end up using both together along with the shampoo/conditioner. I definitely saw the fullness it added to the hair and each strand was visibly thicker. For this client's fine hair, I may have sprayed too much and/or using them together may have been too heavy on her hair, as the blowdry was a bit difficult and left the hair feeling a bit crunchy at the roots, it was still brushable though. I will try again with less product or only using 1 or the 2 sprays.
Date published: 2026-03-11
Rated 5 out of 5 by from Nice serum Gives nice volume after applying and blow drying. Looking forward to seeing long term results.
Date published: 2026-03-10
Rated 4 out of 5 by from Gradually working Been using this for a little over 2 weeks. Though I haven't mucus results yet , I do feel as though it is slowly doing its job. I will continue to use product and see how far this will take my hair in new regrowth.
Date published: 2026-03-10
Rated 5 out of 5 by from Full hair! This gives amazing fullness and is not sticky at all
Date published: 2026-03-09
Rated 2 out of 5 by from No go I had really high hopes so this and I just don’t feel like it lived up to them. I felt like my hair felt dirty and had build up after using.
Date published: 2026-03-09
Rated 4 out of 5 by from Perfect serum for all hair types The Redken Acidic Grow Full System Scalp & Hair Serum is great! I sprayed it onto my scalp after shampooing & conditioning and it added volume without leaving a residue. My hair was easy to brush through after use, which is something I struggle with using other products. I also recommend this serum for people who are looking to improve hair shedding. I have noticed a decrease in the amount of hair on my brush.
Date published: 2026-03-09
Rated 4 out of 5 by from Missing the lift I received this product free for my honest review. As always a fan of Redkin products. I put this product in my hair after using the shampoo and conditioner. I left my hair air dry. It did not give it much lift. Believe this is a product that needs to be heat activated. Will try blow drying after use and should get the lift I was expecting.
Date published: 2026-03-08
Rated 5 out of 5 by from It can't be felt in the hair, yet volume is there! Gives clients volume I haven't gotten with other products!
Date published: 2026-03-08
Rated 4 out of 5 by from Nice volume Redken sent me this free sample through the BzzAgent sampling program. I liked this scalp serum. It works very well with this full Redken line. I also had tried it on its own without the matching shampoo/ conditioner, and it still provides results but just not as intense. The only thing that kind of don't care for is how you must dry your hair within a short time after applying it. If not, it will leave your hair crunchy as if you put mousse in it. So if you prefer air drying your hair, you may not like this. However, when you do blow dry it leaves hair very voluminous.
Date published: 2026-03-08
Rated 5 out of 5 by from Great Volumizing Effect I loved the feel of this serum, it feels very light weight and I can see myself using it consistently. Would recommend it for medium to find textures of hair looking to keep the volume and fullness in their hair as well as with their styling as it does not interfere with your products. Would recommend.
Date published: 2026-03-08
Rated 2 out of 5 by from Oily Wanted to love this system but its just not it for me. The Acidic Grow Full System Scalp & Hair Serum made my hair look oily and weird. With claims of fullness and so much more, I had high hopes. I think this better suited for someone's scalp that has coarser hair and a dry scalp which most people with fine hair don't have.
Date published: 2026-03-08
Rated 5 out of 5 by from Great product I really liked how nice my scalped felt after using this, it felt soothing. Using this with the whole system helps my hair feel more fuller.
Date published: 2026-03-08
Rated 5 out of 5 by from Love it [I received this product in exchange for my honest review] My scalp feel a lot more balanced, I love how lightweight the formula is, it also smells good! But not to strong I can wait for more growth!
Date published: 2026-03-07
Rated 5 out of 5 by from Lightweight, Soothing and Easy to Use 5 stars! I really like this scalp and hair serum. It feels lightweight, easy to apply and does not leave the hair feeling weighed down or greasy. It helps my client's scalp feel comfortable and refreshed, soft and healthy after using it. Does not irritate the scalp and has a nice light clean scent. Great product and I recommend it to all my clients.
Date published: 2026-03-06
Rated 3 out of 5 by from I like it Smells nice, kinda oily but it works well and I like the pump style
Date published: 2026-03-06
Rated 5 out of 5 by from The serum of a 4 part set The serum in this 4 part system is incomparable. The nozzle helps distribute directly on the scalp. It makes it easier to spread the product. It smells heavenly, and helps keep the scalp moisturized.
Date published: 2026-03-06
Rated 3 out of 5 by from Good for Straight, Fine hair I have tried this with clients with straight, fine hair. works so much better for them over someone with curls. I have found applying to hands and working into the scalp is better than using the spray nozzle. My curly hair did not enjoy this spray as it made my hair feel more dry
Date published: 2026-03-06
Rated 5 out of 5 by from Love it My scalp felt so nice and refreshed after using this. I’m really sensitive to fragrance and this didn’t irritate my skin at all. I can’t wait to see how it helps my density.
Date published: 2026-03-06
Rated 5 out of 5 by from Gave my fine hair lift Redken sent me this free sample through the Bzzagent sampling program in exchange for my honest review. This spray has a smaller range which is good for concentrating this product on the roots of my damp hair. Once I apply this serum I massage it into my scalp and then move onto styling my hair. This product gave me a lot of volume at the roots and the results lasted all day. This product gave me a lot more lift and made my flat hair look more healthy. The nozzle on this product is easy to squeeze which makes stying my hair in the morning quicker.
Date published: 2026-03-05
Rated 3 out of 5 by from Gives volume but not my favorite This product does help give volume but leaves the hair a bit gummy.
Date published: 2026-03-04
Rated 4 out of 5 by from Weightless serum for volume Scalp and hair serum does not weigh down your hair. Light weight and not greasy. Hair feels fuller and thicker.
Date published: 2026-03-04
  • y_2026, m_6, d_5, h_14
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.46
  • cp_4, bvpage2n
  • co_hasreviews, tv_14, tr_105
  • loc_en_US, sid_redken-acidic-grow-full-system-scalp-hair-serum, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_saloncentric
  • bvseo_sdk, dw_cartridge, 17.1.0, p_sdk_3.2.0
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  • reviews, product