Redensify Treatment Serum
Clinically shown to increase hair density and volume in 3 months.* This fast-absorbing scalp serum with 3% Redensyl and 1% Kopexil nourishes the scalp, helps reduce shedding, and soothes without greasiness or disrupting your hair style.
When used twice daily as directed, one serum tube typically lasts about 4 weeks for full-scalp application. If you're treating smaller, more targeted areas of thinning, your tube may last longer, up to 6 weeks.
Dermatologist tip: Visible improvements in hair density typically require at least 90 days of consistent use. Most users finish about 2-3 serum tubes during that time.
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- Supports visibly thicker, stronger hair
- Helps reduce hair shedding
- Strengthens the scalp’s natural barrier
- Instantly hydrates the scalp without leaving residue
- Delivers serum precisely and hygienically with a needle-nose tip
Redensyl 3% - Supports hair density and helps maintain a healthy growth cycle
Kopexil 1% - Supports the appearance of fuller-looking hair and helps maintain a healthy follicle environment
TrichoCore Complex™ - Proprietary multi-pathway blend that helps to nourish and fortify hair, from root to tip made up of: Caffeine, Zinc, Adenosine, and Pumpkin Seed Oil
Adapinoid - 3rd generation gentle retinoid that helps revitalize scalp skin
Panthenol + Ectoin - Hydrate and soothe to support a healthy scalp barrier
Full Ingredient List: Water/Aqua/Eau, Glycerin, Propanediol, 1,2-Hexanediol, Panthenol, Diaminopyrimidine Oxide, Cucurbita Pepo (Pumpkin) Seed Oil, Larix Europaea Wood Extract, Camellia Sinensis Leaf Extract, Serenoa Serrulata Fruit Extract, Ectoin, Lecithin, Adenosine, Caffeine, Glycine, Zinc PCA, Octyldodecanol, Ethylhexylglycerin, Zinc Chloride, Sodium Phytate, C9-12 Alkane, Sodium Acrylates Copolymer, Caprylyl/Capryl Glucoside, Sorbitan Oleate, Oleyl Adapalenate, Polyisobutene, Sodium Metabisulfite, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
In a clinical study* of 32 participants with hair thinning confirmed by a board-certified dermatologist:
100% of participants showed improvement in hair density and volume
97% of participants showed improvement in hair thickness
*Based on a 24-week clinical study with 32 participants, dermatologist-evaluated. Results may vary.
Results after 3 months (12 weeks):
100% are satisfied with their results*
97% agree overall hair volume looks improved*
91% noticed an improvement in the appearance of thinning*
91% say hair looks denser in areas of application*
Results after 6 months (24 weeks):
100% report more confidence in their hair’s appearance*
100% would recommend this serum to someone experiencing thinning or shedding*
100% report less breakage*
97% agree areas of previous thinning appear fuller*
*Based on an independent, third-party consumer perception study with 32 participants, measured at 12 and 24 weeks. Responses are self-reported. Individual results may vary.
- Section hair into five parts and apply the serum to dry or damp scalp.
- Massage gently with fingertips to distribute evenly; do not rinse out.
- Non-greasy, fast-absorbing formula sinks in quickly, letting you add it to your routine in seconds.
- Use twice daily for optimal results.
DERMATOLOGIST-FORMULATED
CLINICALLY PROVEN
COLOR SAFE
FRAGRANCE-FREE
VEGAN
Clinically shown to increase hair density, volume, and thickness.*
In an independent clinical study, the Redensify Treatment Serum increased hair density and volume in just 3 months, with added thickness by 6 months.*
*Based on a 24-week clinical study with 32 participants, dermatologist-evaluated. Results may vary.
Baseline
After 24 Weeks
Results after 3 months*
100% are satisfied with their results
97% agree overall hair volume looks improved
91% noticed an improvement in the appearance of thinning
91% say hair looks denser in areas of application
*Based on a 12-week independent consumer perception study with 32 participants. Self-reported. Individual results may vary.
Baseline
After 12 Weeks
Results after 6 months*
100% report more confidence in their hair’s appearance
100% report less breakage
97% agree areas of previous thinning appear fuller
97% report fewer hairs falling out in the shower or when styling
*Based on a 24-week independent consumer perception study with 32 participants. Self-reported. Individual results may vary.
Baseline
After 24 Weeks
How To Use
01
Section Hair
Using a comb or your fingers, section hair into 5 parts to treat the entire scalp, or part only where thinning is visible, like the hairline, part, or crown.
02
Apply & Massage
Gently squeeze to dispense — a little goes a long way. Apply directly to the scalp and massage in. Take a moment for a quick scalp massage; this helps stimulate scalp circulation, supporting optimal conditions for hair growth.
03
Use Twice Daily
For best results, apply morning and night as part of your daily routine.The lightweight, fast-absorbing serum hydrates without leaving residue — so it never feels greasy, sticky, or ruins your blowout.
3% Redensyl
Supports hair density and helps maintain a healthy growth cycle.
1% Kopexil
Supports the appearance of fuller-looking hair and helps maintain a healthy follicle environment.
TrichoCore Complex™
Our proprietary multi-pathway blend featuring Caffeine, Zinc PCA, Adenosine, and Pumpkin Seed Oil to nourish and fortify hair.
Adapinoid
Helps promote healthy skin cell turnover.
Panthenol
Hydrates, soothes, and strengthens the scalp barrier while improving hair elasticity.
Ectoin
Shields the scalp from environmental stress and irritation while supporting barrier health.
What To Expect
Refresh (Weeks 0–6)
- Temporary shedding is normal as follicles refresh
- More balanced scalp with less oil and flaking
Revitalize (Weeks 6–12)
- Hair appears fuller and denser
- Less visible thinning
Reinforce (Weeks 12–24+)
- Hair volume and density continue visibly improving
- Strands look thicker and feel stronger
Frequently Asked Questions
It’s all about consistency. Visible improvements in hair density typically require at least 90 days of consistent use. In the first few weeks, your scalp begins to rebalance, and some may notice a brief increase in shedding as follicles shift into a healthier cycle. Around three months, hair starts to look fuller, with less noticeable thinning. With continued use beyond three months, volume and density continue to improve as stronger strands grow in.
Our Redensify Reset Shampoo is formulated to be gentle and does not contain ingredients commonly avoided during pregnancy or breastfeeding. However, we always recommend checking with your healthcare provider before starting any new personal care product. Our Redensify Treatment Serum contains ingredients such as a retinoid and saw palmetto, so it should not be used during pregnancy or while breastfeeding.
We are happy to report the answer is no! Kerativ formulas were specifically designed for fine and thinning hair, where heavy products can easily weigh hair down. The lightweight textures absorb quickly and provide hydration without leaving a greasy or oily residue on the scalp or hair.
Applying to a clean scalp is ideal, as it allows the formula to reach the scalp more easily without being blocked by excess oil or buildup. However, consistency matters most. The Redensify Treatment Serum was designed to fit easily into your routine, so it can also be applied between washes to desired areas, even if you use styling products or wash your hair less frequently.
With typical daily use, one tube usually lasts about 6 weeks. The formula is designed to be applied directly to thinning areas, so a small amount goes a long way.
- KGKim G.Verified BuyerRated 5 out of 5 starsYesterdaySo far, so good!
I’ve turned 50… and my hormones have been haywire, hence some prolific shedding for my scalp. I’m growing back my shaved hair too(started in January). Eventhough Dr. Park recommends getting the serum going in the late 30’s/early 40’s, I’ve started now since this is a newly released treatment. The crown of my head is where I noticed the most hair thinning. It’s been 3 weeks now and I do notice less shedding and a less sensitive scalp. I’ll continue to use it and am hopeful the new hair coming in will be healthy and match the rest of my hair. Appreciate the science behind this, it’s not just a bunch of herbal essences & oils like so many other serums.
- SHShaun H.Rated 5 out of 5 stars1 month agoGreat results
The center of the back of my head, around the crown where the hair spirals, used to be bald. Now I can actually see some hair growing back. The serum is very easy to use and doesn’t leave my scalp oily. I’m very happy with the results and highly recommend!
- CMChelsey M.Verified BuyerRated 5 out of 5 stars2 months agoLeaves no trace
Convenient to use, doesn't leave a sticky residue or stiff feeling hair. No strong scent, no itching after application. My alopecia spots are filling in after 5 weeks already.
- TCTracy c.Verified BuyerRated 4 out of 5 stars2 months agoMore density
I’m on my second bottle and I’ve seen my part get fuller over a months time of regular use. I use every evening before bed and split my hair in 5 sections and go front to back with a small line of product. So far I’m impressed with the results!
- LHLibby H.Verified BuyerRated 2 out of 5 stars6 days agoI love Dr. Park and the science backed ingredients but…
I realllllllllly wanted to love this. I DO love the shampoo, however after 3 months (almost 4) of using serum twice a day religiously I saw no difference in my very obvious hair thinning at the front of my head and very obvious widening part (I’m 36 YO). Also, I have very curly hair and applying the serum did unfortunately mess with my hair style. I would gently massage and my curls would frizz and lose their curl pattern and I would have to restyle my hair every morning (which curly girls know, is not always a simple task). Ultimately I decided it was too expensive to keep using (my original plan was the 6 month mark) and repurchase and have since switched brands to a spray once a day (my curls are much happier with this type). I do however love the subtle smell of the shampoo and my hair feels “happy” after using it. I’ll continue to use the shampoo as budget allows.
KKerativ3 days agoHi Libby,
Thank you for taking the time to share such thoughtful and detailed feedback with us. We truly appreciate you giving the Kerativ Redensify Treatment Serum a consistent try and taking the time to share how it worked within your routine.
In our six-month clinical trial, participants represented a broad range of scalp and hair types. While this helped us evaluate the serum across diverse needs, we also recognize that individual experiences can vary, and your feedback is an important part of that.
We’re grateful you gave the serum a try, and we’ll be sure to share your experience with our team. We’re also glad to hear you’re enjoying the shampoo and that your hair feels happy after using it.
Thank you again for your time, trust, and thoughtful feedback.