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A bottle of DHT blocking shampoo with text highlighting its ingredients, years of results, and proprietary formula.

#1 DOCTOR RECOMMENDED

HAIR GROWTH BRAND ·

#1 DOCTOR RECOMMENDED

HAIR GROWTH BRAND ·

award winning

CLINICIAN'S CHOICE

Follicle Revival™ Shampoo

15 Active Ingredients

4.9 · 2214 reviews

90 day money-back guarantee

15 science-backed active ingredients work in unison to block DHT, nourish follicles, and strengthen your scalp, stopping shedding and restoring lost density.

Proprietary formula designed for long-term hair health.

Try it for 90 days, completely risk-free.

Autoship Exclusive Perk

LIMITED TIME

Free gift with your 2nd autoship order

Noticeable hair growth can take 90+ days. Autoship keeps you consistent & unlocks a free gift on your 1st renewal.

A before and after comparison showing a man's thinning hair on the left and fuller hair on the right.A before and after comparison of hair on the crown of a man's head, showing increased fullness.A before and after comparison of the top of a woman's head, with hair looking fuller in the second image.A before and after image showing the back of a head with thinning hair on the left and fuller hair on the right.A before and after comparison of a man's hair, showing increased thickness and coverage on the crown.A side-by-side comparison of a person's scalp, showing thinner hair on the left and fuller hair on the right.A before-and-after split image showing a close-up of hair roots that have been colored.A before and after comparison of a man's thinning crown, showing thicker hair in the second image.A before-and-after comparison of the top of a head with grey hair, showing it becoming thicker.
A before and after comparison showing a man's thinning hair on the left and fuller hair on the right.A before and after comparison of hair on the crown of a man's head, showing increased fullness.A before and after comparison of the top of a woman's head, with hair looking fuller in the second image.A before and after image showing the back of a head with thinning hair on the left and fuller hair on the right.A before and after comparison of a man's hair, showing increased thickness and coverage on the crown.A side-by-side comparison of a person's scalp, showing thinner hair on the left and fuller hair on the right.A before-and-after split image showing a close-up of hair roots that have been colored.A before and after comparison of a man's thinning crown, showing thicker hair in the second image.A before-and-after comparison of the top of a head with grey hair, showing it becoming thicker.

90 day guarantee

Regrow hair or it's free

If you don't see thicker, fuller hair within 90 days, we'll refund you in full. See policy for details.

AS SEEN IN

The MSN logo, which features a butterfly symbol followed by the letters msn.
The MSN logo, which features a butterfly symbol followed by the letters msn.
The MSN logo, which features a butterfly symbol followed by the letters msn.
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See the difference for yourself.

Verified customer before & after photos — unretouched, unfiltered.

The Ultimate Hair Growth Shampoo

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Stops Hair Loss at the Root

Strengthens & Repairs Hair Strands

Nourishes Scalp with Conditioning Oils

Addresses Multiple Causes of Loss

Kiierr

swipe to see all treatments →

Ingredients backed by research.

Clinically supported ingredients reawaken dormant follicles & rebuild visible thickness.

ALL NATURAL

Clinically SUPPORTED

Real data. Real growth.

Real data. Real growth.

CUSTOMER SURVEY RESULTS

Kiierr shampoo + LLLT

+41 hairs/cm²

Placebo

+3 hairs/cm²

Terminal hair count increase

*In customer reported results over 6+ months, Kiierr Vitamin users saw approximately 41+ new hairs per cm² compared to placebo.

CUSTOMER SURVEY RESULTS

+95

%

PLACEBO

KIIERR

STRONGER, HEALTHIER HAIR

after 90 days of use*

Frequently Asked Questions

Message us at sales@kiierr.com to connect with a dedicated support agent. Our small, knowledgeable team personally responds to every email (no bots or AI). We’re always here to help and make sure your questions are answered quickly & with care.

When will I start seeing results?

How is Kiierr different from a regular shampoo?

Is it safe for color-treated or chemically processed hair?

How often should I use it?

Do I need to keep using it long term?

Trusted by 125k+ Happy Customers

4.9 (2214 reviews)

Aaron G.

I started using the Kiierr shampoo about 6 months ago after noticing my hair was getting thinner and I was seeing way more shedding in the shower. I did not expect a huge change, but over time my hair started feeling fuller and healthier. The shedding has definitely slowed down and my hair just feels thicker overall. It also leaves my scalp feeling really clean. I am really happy with the progress I have seen so far.

Miles F.

My crown had started looking pretty thin and it bothered me whenever I caught it in the mirror. Since using the Kiierr shampoo, that area looks denser and my hair feels healthier overall.

Nancy R.

I went through a really stressful period and started noticing a lot more hair coming out than usual. My hair felt thinner and looked flat. After using the Kiierr shampoo regularly, my hair feels stronger again and looks fuller. The shedding has eased up and my hair just seems healthier overall now.

Andrew L.

I started noticing more hair falling out when I washed it and my hair just did not feel as full as it used to. I began using the Kiierr shampoo and it has really helped. My hair feels stronger, looks healthier, and I am seeing much less shedding now.

Abby Y.

My hair feels fuller, softer, and much healthier since I started using the Kiierr shampoo. It is easy to use and my hair just looks better overall now.

Mark J.

I started noticing thinning around my crown and it was becoming more obvious in photos and under bright light. I began using the Kiierr shampoo consistently and after a few months I realized my hair looked fuller in that area. It does not feel as thin when I run my hand through it anymore. I also see a lot less hair in the drain after washing. Overall my hair just seems stronger and healthier than before.

Stella W.

My hair had started thinning a bit. It was not super obvious yet, but I could tell something had changed because it did not feel as full when I ran my fingers through it. I wanted to get ahead of it before it became a bigger problem. I started using the Kiierr shampoo and have been really happy with it. My hair feels stronger, looks fuller, and I am noticing far less shedding when I wash and style it now.

Cole R.

My hair looks fuller, feels healthier, and I am really happy with the results.

Blake G.

I started noticing the spot on my crown becoming more visible, especially under bright lights or in photos. It was not terrible yet, but it was enough that it bothered me. I started using the Kiierr shampoo and stuck with it as part of my normal routine. My hair feels stronger and has better coverage in that area now. It also just looks healthier overall. I am definitely seeing less hair coming out when I wash it too.

Jacob H.

I started using the Kiierr shampoo and quickly noticed my hair felt stronger and looked healthier. I also see a lot less hair in the sink after washing now.

Lainey R.

I started using Kiierr shampoo because the top of my hair had gotten so thin you could see my scalp where I parted it. After about 4 months of using it, my hair started looking fuller and the part does not look as wide anymore. It feels thicker and healthier, and I’m really happy with how it’s improving.

May F.

My hair has gradually gotten thinner over the years, which I suppose happens with age, but I did not want to start using messy treatments or take medications that might affect my health. I prefer to keep my routine simple. I decided to try the Kiierr shampoo and have been pleasantly surprised. My hair feels softer and looks a bit fuller, especially near the top where it had become sparse. It is very easy to use and fits right into my normal routine, which I appreciate. I am quite pleased with the results so far.

Leo H.

I have had a lot of thinning over the years and honestly thought that ship had sailed for me. I started using a laser cap and added the Kiierr shampoo alongside it. The two together have made a noticeable difference. My hair feels stronger and looks fuller than it has in quite some time. Even my wife pointed out that the thinning is not as obvious anymore. That meant a lot coming from her. It is simple to use and fits right into my routine without any hassle.

Paula B.

I started noticing a lot more scalp showing along my part and it really started to worry me. My hair just did not have the same fullness it used to and it felt like it was getting worse every month. I decided to try the Kiierr shampoo and stuck with it as part of my regular routine. I am really glad I did. My hair feels thicker and my part does not look nearly as wide anymore. It also feels softer and healthier overall, which has made a big difference in my confidence.

Brad A.

I have worn my hair long for years, so when it started getting thinner it was pretty easy to notice. I started using the Kiierr shampoo and over time my hair began to feel stronger and look fuller again. It also seems like I am losing a lot less hair when I wash it now.

Marie Z.

My hair had gotten really thin and dull looking, and it just did not have the same life it used to. After using the Kiierr shampoo for a while, I started noticing a big difference. My hair looks thicker, feels much smoother, and has a healthy shine again. It is easier to style and just looks so much more vibrant than before.

Elisa E.

As I started going through menopause I noticed my hair thinning, especially around my temples. It was subtle at first, but my hair just did not feel the same. I decided to try the Kiierr shampoo and began taking photos along the way. The before and after pictures are not some dramatic transformation, but I can absolutely feel the difference. My hair feels much thicker, especially around my temples where it had gotten sparse. It is also noticeably softer and the color even looks richer and healthier. When I run my hands through it now, it finally feels like my hair again. Aging is part of life, but this has helped me feel beautiful and confident through the process.

Paula B.

I started noticing a lot more scalp showing along my part and it really started to worry me. My hair just did not have the same fullness it used to and it felt like it was getting worse every month. I decided to try the Kiierr shampoo and stuck with it as part of my regular routine. I am really glad I did. My hair feels thicker and my part does not look nearly as wide anymore. It also feels softer and healthier overall, which has made a big difference in my confidence.

Heather H.

I started noticing my hair getting thinner overall, but I did not realize how noticeable it had become until I saw a photo of myself from the back. You could clearly see my scalp and it honestly shocked me. I immediately started researching options but I was on a budget and did not want to waste money on something that would not work. I decided to try the Kiierr shampoo and I am really glad I did. My hair looks fuller now and that thin spot in the back is not nearly as noticeable anymore.

John R.

I have male pattern baldness and was already using a laser cap, but adding the Kiierr shampoo made a noticeable difference. My hair started looking thicker much faster and the overall progress really seemed to speed up.

Karen P.

I started noticing my hair getting thinner and could not really tell if it was from age or maybe a medication I had started. It had only just begun, so I wanted to do something about it early. My son actually recommended the Kiierr shampoo and conditioner to me because he had been using their laser cap and liked it. I figured it was worth trying. I am really glad I did because my hair feels healthier and has a bit more fullness already, which makes me feel much better about it.

Mark R.

I have male pattern baldness and started using the laser cap along with the Kiierr shampoo. Together they have made a noticeable difference. My hair feels stronger and looks fuller than it did before.

Aaron G.

I started using the Kiierr shampoo about 6 months ago after noticing my hair was getting thinner and I was seeing way more shedding in the shower. I did not expect a huge change, but over time my hair started feeling fuller and healthier. The shedding has definitely slowed down and my hair just feels thicker overall. It also leaves my scalp feeling really clean. I am really happy with the progress I have seen so far.

Miles F.

My crown had started looking pretty thin and it bothered me whenever I caught it in the mirror. Since using the Kiierr shampoo, that area looks denser and my hair feels healthier overall.

Nancy R.

I went through a really stressful period and started noticing a lot more hair coming out than usual. My hair felt thinner and looked flat. After using the Kiierr shampoo regularly, my hair feels stronger again and looks fuller. The shedding has eased up and my hair just seems healthier overall now.

Andrew L.

I started noticing more hair falling out when I washed it and my hair just did not feel as full as it used to. I began using the Kiierr shampoo and it has really helped. My hair feels stronger, looks healthier, and I am seeing much less shedding now.

Abby Y.

My hair feels fuller, softer, and much healthier since I started using the Kiierr shampoo. It is easy to use and my hair just looks better overall now.

Heather H.

I started noticing my hair getting thinner overall, but I did not realize how noticeable it had become until I saw a photo of myself from the back. You could clearly see my scalp and it honestly shocked me. I immediately started researching options but I was on a budget and did not want to waste money on something that would not work. I decided to try the Kiierr shampoo and I am really glad I did. My hair looks fuller now and that thin spot in the back is not nearly as noticeable anymore.

Lainey R.

I started using Kiierr shampoo because the top of my hair had gotten so thin you could see my scalp where I parted it. After about 4 months of using it, my hair started looking fuller and the part does not look as wide anymore. It feels thicker and healthier, and I’m really happy with how it’s improving.

May F.

My hair has gradually gotten thinner over the years, which I suppose happens with age, but I did not want to start using messy treatments or take medications that might affect my health. I prefer to keep my routine simple. I decided to try the Kiierr shampoo and have been pleasantly surprised. My hair feels softer and looks a bit fuller, especially near the top where it had become sparse. It is very easy to use and fits right into my normal routine, which I appreciate. I am quite pleased with the results so far.

Leo H.

I have had a lot of thinning over the years and honestly thought that ship had sailed for me. I started using a laser cap and added the Kiierr shampoo alongside it. The two together have made a noticeable difference. My hair feels stronger and looks fuller than it has in quite some time. Even my wife pointed out that the thinning is not as obvious anymore. That meant a lot coming from her. It is simple to use and fits right into my routine without any hassle.

Paula B.

I started noticing a lot more scalp showing along my part and it really started to worry me. My hair just did not have the same fullness it used to and it felt like it was getting worse every month. I decided to try the Kiierr shampoo and stuck with it as part of my regular routine. I am really glad I did. My hair feels thicker and my part does not look nearly as wide anymore. It also feels softer and healthier overall, which has made a big difference in my confidence.

Mark R.

I have male pattern baldness and started using the laser cap along with the Kiierr shampoo. Together they have made a noticeable difference. My hair feels stronger and looks fuller than it did before.

Mark J.

I started noticing thinning around my crown and it was becoming more obvious in photos and under bright light. I began using the Kiierr shampoo consistently and after a few months I realized my hair looked fuller in that area. It does not feel as thin when I run my hand through it anymore. I also see a lot less hair in the drain after washing. Overall my hair just seems stronger and healthier than before.

Stella W.

My hair had started thinning a bit. It was not super obvious yet, but I could tell something had changed because it did not feel as full when I ran my fingers through it. I wanted to get ahead of it before it became a bigger problem. I started using the Kiierr shampoo and have been really happy with it. My hair feels stronger, looks fuller, and I am noticing far less shedding when I wash and style it now.

Cole R.

My hair looks fuller, feels healthier, and I am really happy with the results.

Blake G.

I started noticing the spot on my crown becoming more visible, especially under bright lights or in photos. It was not terrible yet, but it was enough that it bothered me. I started using the Kiierr shampoo and stuck with it as part of my normal routine. My hair feels stronger and has better coverage in that area now. It also just looks healthier overall. I am definitely seeing less hair coming out when I wash it too.

Jacob H.

I started using the Kiierr shampoo and quickly noticed my hair felt stronger and looked healthier. I also see a lot less hair in the sink after washing now.

John R.

I have male pattern baldness and was already using a laser cap, but adding the Kiierr shampoo made a noticeable difference. My hair started looking thicker much faster and the overall progress really seemed to speed up.

Brad A.

I have worn my hair long for years, so when it started getting thinner it was pretty easy to notice. I started using the Kiierr shampoo and over time my hair began to feel stronger and look fuller again. It also seems like I am losing a lot less hair when I wash it now.

Marie Z.

My hair had gotten really thin and dull looking, and it just did not have the same life it used to. After using the Kiierr shampoo for a while, I started noticing a big difference. My hair looks thicker, feels much smoother, and has a healthy shine again. It is easier to style and just looks so much more vibrant than before.

Elisa E.

As I started going through menopause I noticed my hair thinning, especially around my temples. It was subtle at first, but my hair just did not feel the same. I decided to try the Kiierr shampoo and began taking photos along the way. The before and after pictures are not some dramatic transformation, but I can absolutely feel the difference. My hair feels much thicker, especially around my temples where it had gotten sparse. It is also noticeably softer and the color even looks richer and healthier. When I run my hands through it now, it finally feels like my hair again. Aging is part of life, but this has helped me feel beautiful and confident through the process.

Paula B.

I started noticing a lot more scalp showing along my part and it really started to worry me. My hair just did not have the same fullness it used to and it felt like it was getting worse every month. I decided to try the Kiierr shampoo and stuck with it as part of my regular routine. I am really glad I did. My hair feels thicker and my part does not look nearly as wide anymore. It also feels softer and healthier overall, which has made a big difference in my confidence.

Karen P.

I started noticing my hair getting thinner and could not really tell if it was from age or maybe a medication I had started. It had only just begun, so I wanted to do something about it early. My son actually recommended the Kiierr shampoo and conditioner to me because he had been using their laser cap and liked it. I figured it was worth trying. I am really glad I did because my hair feels healthier and has a bit more fullness already, which makes me feel much better about it.