★★★★★February 4, 2026
AHHHHH-MAZZZING!!!
Amazing shampoo! First time I heard about K18 was from a new stylist - she put the K18 leave-in molecular repair hair mask on my hair after my bleach/color job and I love how it made my hair. I bought some for myself and used with my regular shampoo. Worked pretty good. Enough to buy more. Went to a new stylist and my hair got burnt up. Bad. So I tried this product and bought the K18 shampoo and WOWWWWW!!! - I can’t even believe the difference when used together! My fine, thin, very broken bleached hair looks much healthier and shinier after just 2 washes and 2 treatments with K18!! I wish I would have taken pics! I usually have to wash every day or every other day but went a whole week with using dry shampoo only once and it wasn’t dry at all. It feels and looks so much healthier! I can’t wait to try their K18 conditioner when I’m done with this treatment! (Ie: Use the treatment 4-6 times after shampooing with no conditioner then switch to conditioner and use the treatment just as needed!) I’m so glad I found this! Thank you K18!!!
Jesus Loves and SavesVerified purchaseHelpful (15)
★★★★★February 10, 2024
GREAT SHAMPOO
This shampoo is very cleansing and my hair felt very clean after first use. This shampoo is gentle enough to able to be used multiple times a week. It has a really good scent and my hair feels soft and is very shiney after use.
TamiVerified purchaseHelpful (11)
★★★★★April 7, 2026
It’s simply YES
I bleach and color my hair A LOT, to the point that my naturally medium dark brown hair is a white lavender grey. Normally this would be problematic with things like drying out, frizzing, brittle, damaged hair. But people can not get over how healthy my hair is! Not just looks but feels. One wash and my hair felt clean and light. I don’t feel like I am fighting to add moisture in my hair constantly. I wouldn’t say it’s a miracle worker, I still have minor breakage but all things considered, it is nothing like what it probably should be with that much bleach! Using the shampoo and conditioner for a few months now with both the oil and mask as needed, and I gotta say I am very pleased. Yes, it is expensive. I still feel a little bit of a gut punch every time I buy it, but I only wash my hair once a week so it lasts me awhile. This will strip a little color out when you wash. For me, that’s not so problematic but I could see it being an issue for people that use heavier coloring. I find the fragrance very pleasant.
MadelynVerified purchaseHelpful (9)
★★★★★January 7, 2024
Hair Savior: K18 Peptide Prep™ Smoothing pH Maintenance Color-Safe Shampoo
I am thrilled to share my experience with the K18 Peptide Prep™ Smoothing pH Maintenance Color-Safe Shampoo, and I can confidently say that I love it! This daily-use shampoo has become a game-changer in my hair care routine for several compelling reasons. Revolutionary Peptide Technology: The standout feature of this shampoo is the incorporation of revolutionary peptide technology. My hair feels transformed with each wash, appearing healthier, shinier, and more resilient. The peptides work wonders in repairing and strengthening the hair, leaving me with improved texture and manageability. Smoothing and Color-Safe Formula: The smoothing formula lives up to its promise, taming frizz and making my hair sleek. As someone with color-treated hair, I appreciate that it is color-safe, preserving the vibrancy of my hair while addressing common concerns like frizz and damage. Daily Use without Stripping: Unlike some daily-use shampoos, the K18 Peptide Prep™ maintains the perfect balance of effectiveness without stripping the hair of its natural oils. It's gentle yet powerful, allowing me to use it daily without worrying about over-drying or compromising the health of my hair. pH Maintenance for Optimal Health: The commitment to pH maintenance is evident in the exceptional health of my hair. The shampoo helps restore and maintain the optimal pH level, contributing to a healthy scalp and overall hair vitality. It's a holistic approach to hair care that sets this product apart. Delightful Fragrance and Lather: The shampoo boasts a delightful fragrance that elevates the entire washing experience. The lather is rich and luxurious, creating a spa-like atmosphere in my shower. The sensory aspect adds an extra layer of indulgence to my daily routine. Noticeable Results: After consistent use, I've noticed a remarkable difference in my hair's overall health and appearance. It feels firmer, smoother, and more resilient, making the K18 Peptide Prep™ a true hero in my hair care arsenal. In conclusion, the K18 Peptide Prep™ Smoothing pH Maintenance Color-Safe Shampoo has exceeded my expectations. It's a luxurious and practical daily-use shampoo that delivers on its promises, leaving me with hair that looks and feels fantastic. I wholeheartedly recommend it to anyone searching for a transformative and nourishing shampoo for daily use.
CelesteVerified purchaseHelpful (7)
★★★★☆October 22, 2023
Good for thin oily hair, but it isn’t a magic fix
When you shampoo with this, you only need about a quarter size amount of shampoo or even less. You’re supposed to focus on the scalp only — not the ends of your hair. I am using it with the K18 hair repair conditioner that you use when you get out of the shower, so I usually just shampoo and then get out. It’s a good shampoo for clean feeling hair, but it’s not a magic pill that will make it possible to go longer between washes. I still use dry shampoo on day 2 or 3. I like that it doesn’t have any strong fragrance and doesn’t I rotate my scalp. Overall I would still probably repurchase, along with the leave in conditioning treatment.
LiraVerified purchaseHelpful (7)
★★★★★May 30, 2026
Finally Found a Shampoo That Helps Dry Hair
I have older, dry hair and this shampoo has made a noticeable difference. My hair feels softer, looks healthier, and has much less frizz than before. It cleans well without stripping away moisture, which is hard to find. A little goes a long way, and my hair feels better after every wash. Definitely worth trying if dry, aging hair is a concern.
Michael CollinsVerified purchaseHelpful (6)
★★★★★December 3, 2023
Repaired my hair!
I like this product because it repaired my hair from a break off nightmare. The product does not dry out my hair. It leaves it soft and silky and manageable. I would recommend this product to anybody anybody that is having trouble with break off or dried out hair. It also has helped reduce frizz.
MeganVerified purchaseHelpful (5)
★☆☆☆☆March 11, 2024
Seller not good!
I got this and it was only half full and no seal! Looked like it had been used! I will get mine from Sephora from now on! I’m not paying for half a bottle! This is a good product but expensive!I won’t purchase from Amazon anymore!
Rebecca SteeleVerified purchaseHelpful (5)
★★★★☆October 27, 2023
Cleans well
Hairdresser used on my friend last time they were there, and they liked it; so, I got it for them. Seems to clean well and leaves hair soft when used with the company's leave in conditioner. A bit pricey, but seems worth it.
Ron MVerified purchaseHelpful (4)
★★★★★February 17, 2024
Great Product
I tried this shampoo, and I did feel my hair more hydrated. I liked it because my hair is blonde so the shampoo really helps keeping my hair healthy.
Paula RuthenbergVerified purchaseHelpful (4)
★★★★★November 28, 2023
worked as expected
I got the shampoo and the mask treatment and used them both yesterday. My hair was easy to shampoo and I left the treatment on long enough before I added leave in condition so that I could brush through my long hair. It was all good.
CoCo's MomVerified purchaseHelpful (4)
★★★★★January 9, 2024
I could tell a difference in 1 wash
I purchased this product as recommended by someone off social media. I needed a clarifying shampoo and this product works well! My hair is so soft and shiny after just one use. I'm excited to try other products in this line. It lathers up a lot if that means anything to anyone. I didn't mind either way
Patricia SherlyVerified purchaseHelpful (4)
★★★★★June 2, 2023
Eh
It was really good when I used the mask afterwards but it makes my hair feel drier than before and fall out in bunches which has never happened. If you add a lot of the k18 hair mask and oil it will make your hair feel bouncy and soft but the hair loss has been concerning
anaVerified purchaseHelpful (4)
★★★★★June 26, 2024
Horrible bottle design
Love the product but it is like washing your hair with a brick in your hand! Hard to open, too wide, too stiff. Redesign the bottle, please.
Dianna SmithVerified purchaseHelpful (3)
★★★★★May 18, 2024
Best shampoo I’ve ever used
This changed my hair in the best way. It’s expensive but it’s high quality. Would recommend
MaggieVerified purchaseHelpful (3)
★★★★☆June 23, 2023
Packaging not user friendly
Nice shampoo but container is difficult to use. The product seems to be sealed but the cap is not removable and no instructions. Once you manage to puncture the seal,, the plastic bottle is so rigid, it is difficult to get the shampoo out. Would not purchase again. It is also expensive for the quantity.
Ann R.Verified purchaseHelpful (3)
★★★★★August 7, 2023
Love this shampoo.
I wish I could give this product more than 5 stars. I’ve been dying my hair black for a little over a year now, and this shampoo has made my hair so shiny and healthy. I could go as far as saying that my hair is healthier now than when I had virgin hair. Be sure to only apply to the roots!!
Alyssa FosterVerified purchaseHelpful (2)
★★★★★August 18, 2023
oily hair girls this is for you!!!
I have had my eye on this product for some time and decided i’d give it a try. I deal with extremely oily hair that looks dirty the same day I wash it. My hair is noticeably softer, shiner, and cleaner looking after just one wash. 100% worth the money and will be purchasing over and over again!
Cierra DjamoosVerified purchaseHelpful (2)
★★★★★June 29, 2026
Fantastic shampoo that cleans well without drying! Great suds for sulfate free!
I am obsessed with this shampoo. I got it after my keratin treatment and it’s been wonderful. I go about a week between washes and it gets my hair super clean without my hair feeling stripped. It suds up nicely for a sulfate free shampoo which I love! The smell is really nice without being overpowering. My scalp feels so good and less dry!
smuttyaudiophileVerified purchaseHelpful (2)
★★★★★February 3, 2024
Clean and soft hair
Ive been using this shampoo as a daily one for the past 3 weeks and I can definitely see the difference. It cleans the scalp so well and makes your hair feel so soft. It is an amazing product but I totally would see why so people debate on buying it because of the price.
Antonella DluyzVerified purchaseHelpful (2)
★★★★★March 18, 2024
life changing!
this is the best repair shampoo and treatment, will always recommend!
Brittany Boggs ❤️Verified purchaseHelpful (2)
★★★★★July 11, 2026
It helped
I think this shampoo helped my hair to retain length, it made it stronger. I was coming out of a bad color situation and had a lot of breakage, this halted the breakage but not entirely. I guess damaged hair that is beyond help will come out. All in all a good shampoo
LindaVerified purchaseHelpful (2)
★★★★★February 19, 2024
K18 Shampoo
I used for the first time this morning. My hair is really dry from coloring, washing every day, etc. This shampoo was very gentle on hair and didn't make it seem as hard and brittle. Ordering the conditioner next to see how it works as well!
MelVerified purchaseHelpful (2)
★★★★☆July 21, 2023
Expensive product
I just don’t know if I should continue using this product due to the fact that it is expensive and I don’t know if it’s worth buying the bigger bottle. I was hoping to get a few uses out of the bottle. My hair is way too thick for the amount that it is telling you to use.
gayleneVerified purchaseHelpful (2)
★★★☆☆September 19, 2023
not sure how I feel yet
At first I really liked it but the more I use it I dont know if it is making my hair dry. I will say that it does feel very clean after using! using the leave in treatment by k18 helps with the dryness but if I dont, my hair doesn't feel or look the best. I will do an updated review maybe once I've used it for a little longer.
chelseaVerified purchaseHelpful (2)
★☆☆☆☆February 26, 2024
Major hair loss & shedding!!!!
Since using this shampoo it caused so much hair loss and everyday it’s like a handful! I can feel it shedding even when I’m not brushing!
J**Verified purchaseHelpful (2)
★★★★★December 12, 2024
This product line saved my hair
Run don’t walk especially if you have bleach blonde hair, or any processed color/bleached hair for that matter. This product line literally saved my hair. I had a bad experience with doing my new growth blonde hair which ended up fried and uneven. I’ve used this line every day and it’s repaired my whole head.
Ashley Michele wisdomVerified purchaseHelpful (1)
★★★★★March 16, 2024
I love it
Very nice and basic shampoo for before the k18 treatment
SuzieVerified purchaseHelpful (1)
★★★★★February 27, 2024
Excellent shampoo
Brings life and bounce to tired hair.
Aptos, CAVerified purchaseHelpful (1)
★★★★★July 19, 2026
Game Changer
The only shampoo to EVER make game changing results. Before this shampoo, I would have to wash my hair every day because I have thin hair and it would look greasy making the thinner more prominent. I can go up to 4 days without washing, and it looks and feels so much healthier. Worth the cost and I hope they never stop making it!
April GunterVerified purchaseHelpful (1)
★★★★★June 8, 2026
Great repair product
I like automatic shipping for my order, but prefer to receive all three products that receiving all 4 items together. I will have to wait till have . Great products, love how Thank you .
Andrea j GillilandVerified purchaseHelpful (1)
★★★★★January 22, 2024
A must when you shampoo with the K18.
Its magic! A little goes a very long way… too much and you might as well get back in the shower to shampoo and try again because your hair will not absorb the excess amount applied. I also use the K18 oil and the trio : shampoo, creme’, oil … I could air dry my hair and it still feels like it did in my 20’s! My hair ages just like the rest of me and I refuse to just allow dull, dry, and breakage to win. Give your hair some REAL care, but use K18 as directed to the “T” and your hair will thank you .
Charleen Rhonda WrayVerified purchaseHelpful (1)
★★★★★July 3, 2026
A great buy. Works great. Your hair will look and feel beautiful
This product is a little pricey but very very well investment to maintain healthy hair
Julian & Raquel MoralezVerified purchaseHelpful (1)
★★★★★July 16, 2026
Worth it
During the summer I’m always at the pool or beach, but the water always dries out my hair making it feel brittle. My hairdresser recommended I use this after and it’s brought my hair back to life making it hydrated and smoother.
MackenzieVerified purchaseHelpful (1)
★★★★★October 18, 2023
Best shampoo for fine damaged hair
This shampoo leaves your hair soft and silky! You only need a dime sized amount and work it into your scalp really good. I have very thin, chin length hair and I shampooed it with K18 and used 2 pumps of the leave in K18 hair mask and I love how my hair looked and feels after I style it!
Brandx101Verified purchaseHelpful (1)
★★★★☆July 7, 2026
Great shampoo & conditioner
This shampoo is the best! The only thing i don’t like is the bottles leak when traveling on a plane or even just in my cosmetic bag traveling in the car :( for the price I’d love for the bottle to be better
Peyton TaylorVerified purchaseHelpful (1)
★★★☆☆September 21, 2023
Works but gives me dandruff
I do feel like this product cleans my hair very well but it has given me A LOT of dandruff which is very annoying bc its pricey. I have never had dandruff so I know its this product that is producing it. I know everyone's hair is different so maybe it works better on others.
Kay KayVerified purchaseHelpful (1)
★☆☆☆☆February 25, 2024
Made my hair fall out!!!
No! Do not use this, it made the hair fall out.
DeeVerified purchaseHelpful (1)
★★☆☆☆July 7, 2026
Never again because this is ridiculous .
What a freaking rip off ! 😡 My eyes aren’t that good reading small print on this phone but when I spend a good amount of money for a bottle of shampoo or conditioner , I expect to receive more that an ounce of freaking product !! Photo attached
Karen L. MillerVerified purchase
★★★★★April 17, 2024
Love it
TIP: Start off by using about 1/4 of what you think you'll need, otherwise you'll be rinsing for days. I've been having issues with the texture of my hair for many months. It has felt dry, brittle, and just yuck. After rinsing this out, my hair honestly felt the same or worse and I was initially hugely disappointed. But then I used the K18 Leave In Conditioner as suggested and HOLY COW....MAJOR improvement!!
EmilyVerified purchase
