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 4 out of 5 by from Shiny This is the hero product of the system. It helps reduce breakage, protects against heat, and visibly improves the overall strength of the hair. Perfect for clients growing out their hair or maintaining extensions—it adds softness, shine, and protection in one step.
Date published: 2026-03-24
Rated 5 out of 5 by from Impressed I loved how refreshing and how much body it gives me I’m so obsessed with it . I’ve noticed so much difference on my scalp health
Date published: 2026-03-24
Rated 4 out of 5 by from Great Product The product felt good to apply to the hair. With a semi thick consistency that coats the hair nicely. I used it with the shampoo and conditioner. It has a pleasant fragrance, and let my hair feeling fuller.
Date published: 2026-03-23
Rated 5 out of 5 by from Va Va Va Volume [Employee of saloncentric] This stuff is magic if used correctly. It could be easy to use too much which can cause hair to feel yucky. A few sprits through the crown and then worked through with a comb prior to heat styling gives noticeable volume from roots to ends. This system is the perfect addition to a big 90’s blowout look.
Date published: 2026-03-23
Rated 3 out of 5 by from this is a spray not a serum I Received Redken Acidic grow system for free in exchange for reviews. I used this scalp and hair serum along with the other 3 products in the system. While this is called a scalp and hair serum it’s actually a spray bottle. The product does provide a lift at the root which is nice. You can definitely feel the product in the hair which some people may not love. My hair felt fuller after using but I didn’t like the softness it takes away. Can’t say I would recommend
Date published: 2026-03-23
Rated 5 out of 5 by from Awesome system I’ve really enjoyed using the Acidic Grow Full System. I have used this product for close to two months now. Even from the first few uses, I have noticed my hair feels stronger and healthier. All the products have left my hair feeling soft and not heavily weighed down. I would highly recommend this full system to clients wanting to repair, strengthen, and grow their hair.
Date published: 2026-03-23
Rated 5 out of 5 by from I’m really liking this serum so far. It’s lightweight, non-greasy, and absorbs quickly while still leaving the hair feeling stronger and healthier. My clients have also been loving it, especially for thinning and breakage. I do wish I had more time to fully evaluate long-term growth results, but first impressions are very positive and I’ll definitely keep using it.
Date published: 2026-03-22
Rated 3 out of 5 by from Not really a serum? I can’t give it a five star as I don’t believe it is a serum. It’s a pump dispenser that you spray at your roots but I feel it uses the product very quickly with this type of application. I’m not sure how well it would work on its own as I am using the entire system. It did not make my hair “greasy” but did seem to offer a bit of texture to the area applied
Date published: 2026-03-22
Rated 4 out of 5 by from Easy to apply!! Overall easy application and easy wto get into root. Leaves scalp feeling fresh and nourished.
Date published: 2026-03-21
Rated 5 out of 5 by from Always recommend! I love this line of hair products, my hair was falling out so bad. I knew it was time to get me some! I can always depend on redken, I always recommend and use it again and again!!
Date published: 2026-03-21
Rated 4 out of 5 by from Good for thicker look You have to be a little careful with how much product you use, as it can make the hair feel a little bit rough/almost sticky but I think it was definitely over-use. Did make hair for sure look and feel fuller though!
Date published: 2026-03-20
Rated 4 out of 5 by from Good product Overall, pleasant smell. I did kind of feel like I was doing a skin care treatment on my scalp, which was nice because it was refreshing. But I did feel as if once I blow dried it felt like it dried the hair out slightly. It didn’t weigh the hair down. I would recommend but I think if you used it with the whole system, it would work best.
Date published: 2026-03-19
Rated 5 out of 5 by from The best product in the line Like skin care for your scalp. This product is lightweight, you wont notice it on the scalp. Its purpose is to hydrate the scalp. Hair health starts with scalp health, so this product is key. This is the only product in the line that would be effective as a stand-alone product. Results wont be noticeable right away, but just like skin on our face, eventually you'll notice the results.
Date published: 2026-03-19
Rated 5 out of 5 by from Great volume at root Instantly calms my scalp and gives me volume and thickness at the root. Not sticky or drying and I love the spray nozzle to deliver this directly to the scalp and root!
Date published: 2026-03-18
Rated 5 out of 5 by from ⭐️⭐️⭐️⭐️⭐️ ⭐️⭐️⭐️⭐️⭐️ Redken acidic grow full scalp and hair serum . Spray is a nice fine mist and doesn’t leave hair sticky or heavy . Scent is really light and not really noticeable.
Date published: 2026-03-18
Rated 3 out of 5 by from Ok product Worked ok. Too soon to tell if it actually helps with hair growth. Left my hair feeling kinda dry.
Date published: 2026-03-17
Rated 5 out of 5 by from Love the Line Love the whole line . I really like each product but i have only used all of it together
Date published: 2026-03-16
Rated 3 out of 5 by from Not a must have I love regular acidic bonding shampoo and conditioner line so I was really excited to try this serum out. It smells wonderful and does help the hair feel a little more dense. It feels nice on the scalp. Especially if used with the matching shampoo and conditioner.
Date published: 2026-03-16
Rated 5 out of 5 by from Love the spray serum this spray Serum is extremely good at making your hair feel a little bit more dense brain nozzle the spray more precise and the spray is also not flimsy I actually really like the spray serum
Date published: 2026-03-16
Rated 3 out of 5 by from Not for super fine hair. I received this product as a tester and here’s my honest review. Smells great. It was very heavy on my fine hair.
Date published: 2026-03-16
Rated 4 out of 5 by from Like! I do like this serum, my hair does look and feel thicker. However be very careful to not over spray. The scalp will feel clogged. Overall would recommend !
Date published: 2026-03-16
Rated 3 out of 5 by from Easy to use Client said she enjoyed the product. Easy to use. Smelled nice. She has very fine hair
Date published: 2026-03-16
Rated 5 out of 5 by from Immediate result I got the system for my client who had hair loss due to extreme weight loss. Within the first use, she reported hair felt and looked fuller.
Date published: 2026-03-16
Rated 4 out of 5 by from love the product It’s a pretty good product .helped my scalp and hair feel fuller.
Date published: 2026-03-14
Rated 5 out of 5 by from Love this line I received this product for free for my honest review I love this serum and the whole line. My fine hair has never looked better!! This stuff has not only made my scalp feel amazing but my hair fuller feeling.
Date published: 2026-03-14
Rated 1 out of 5 by from Disappointed I was very disappointed in this product. I didn’t feel like it did anything for my very fine thin hair.
Date published: 2026-03-14
Rated 4 out of 5 by from Enjoyed I really enjoyed this serum. It felt great on my scalp and didn’t leave any residue. I believe with the rest of the system it really did make a difference in the density.
Date published: 2026-03-13
Rated 4 out of 5 by from Scalp moisture and body! I love the fresh scent and overall feeling of this product on my scalp! With dry winter weather, my scalp gets more dry and is in dire need of moisture that doesn’t weigh my hair down but also provides body. This is great and I love the applicator! I received this gift from Redken in exchange for an honest review.
Date published: 2026-03-13
Rated 5 out of 5 by from Great densifying system The line of acidic grow system is really nice. It leaves the hair feeling super clean and it has an amazing subtle scent, not too strong. I did notice that my hair felt more dense after using the system. Looking forward to long term use to see the progress!
Date published: 2026-03-13
Rated 5 out of 5 by from Love I haven’t used this long enough to know the long term benefits but I love it so far! I definitely notice my hair feeling thicker
Date published: 2026-03-13
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  • loc_en_US, sid_redken-acidic-grow-full-system-scalp-hair-serum, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
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