K18 PEPTIDE PREP™ Color-Safe Detox Clarifying Shampoo, Non-Stripping, pH-Optimized Cleanse, Removes Product Buildup, Dirt, Oils & Metals, 8.5 Fl Oz
Condition: New
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 10 left in stock, order soon!
Arrives
Thursday, Dec 11
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Brand: K18
Item Form: Gel
Hair Type: All
Scent: Floral
Age Range (Description): Adult
Product Dimensions : 2.5 x 2.5 x 5.5 inches; 9.6 ounces
Item model number : K18-40035
UPC :
Manufacturer : K18 Hair
Best Sellers Rank: #2,934 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #62 in Hair Shampoo
#62 in Hair Shampoo:
Customer Reviews: 4.6 4.6 out of 5 stars (1,927)
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Dec 11
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
After testing the K18 Peptide Prep Detox Shampoo for two weeks, I’m genuinely impressed with its performance. As someone with color-treated, heat-styled hair, I’m always looking for products that detox the scalp and strands without leaving my hair feeling dry or over-cleansed — and this delivered exactly that. Cleansing Power: This shampoo provides a deep, clarifying cleanse that removes product buildup, excess oil, and environmental residue in just one wash. My scalp felt noticeably cleaner, and my hair had more natural volume at the roots. It’s strong enough to reset your hair without feeling harsh or over-drying. Gentleness & Formula: Despite the deep-cleaning effect, it doesn’t strip the hair. It’s sulfate-free and feels balanced — no squeaky or tangled feeling afterward. It lathers well with just a small amount, and the clean, subtle scent is refreshing without being overwhelming. Compatibility: It works especially well as a prep step before using bond-building or peptide-based treatments like the K18 leave-in molecular repair mask. I noticed that post-shampoo treatments seemed to absorb better and left my hair feeling smoother and stronger. ✅ Pros: Deep-cleansing without dryness Great prep for repair/bonding treatments Clean scent, good lather Safe for color-treated and damaged hair A little goes a long way ❌ Cons: Not intended for everyday use — best 1–2x per week (but that’s typical for clarifying products)
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Reviewed in the United States on June 19, 2025 by Rachel
This shampoo is great quality and is a great price. The shampoo is very detoxifying and leaves my hair very clean. The shampoo doesn't make my hair feel heavy.
Reviewed in the United States on October 25, 2025 by Faisal Ijaz
I love K18 especially the detox one it really gets my hair a deep clean where I don’t have to wash it the next day. Very exceptional product for a shampoo a bit on the expensive side, but worth the money. The second time I bought the shampoo because I was very satisfied with the results would definitely recommend this to anybody. Because it’s worth the money and definitely does not disappoint.
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Reviewed in the United States on September 29, 2025 by Jolly
Should be a good detox product. It smells good
Reviewed in the United States on December 3, 2025 by Patsy
I’ve tried a few K18 products, and my experience has been mixed. The K18 Detox Shampoo is a standout—it deeply cleanses without drying out my hair, and it really helped clear up product buildup. My scalp felt fresh, and my hair looked noticeably cleaner and more vibrant. The Molecular Repair Hair Mask also lived up to the hype. After just a couple uses, my hair felt softer, stronger, and healthier. It’s lightweight, and I love that it repairs without needing to be rinsed out. Unfortunately, the K18 Peptide Prep Shampoo, Conditioner, and Hair Oil didn’t work for me. They left my hair feeling dry, dull, and lifeless—even after just one use. For the price, I expected better results. Overall, I’ll stick to the Detox Shampoo and Repair Mask, but I won’t be repurchasing the rest.
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Reviewed in the United States on April 4, 2025 by Roxi
I usually use scalp scrubs, but this is my first clarifying shampoo, it did the job of cleaning my hair very well. I bought it to use the K18 treatment. So I didn’t use conditioner or mask after. It did make my hair dry but also my hair still have a bit of dryness on the ends from highlights I did a year ago. However after using the mask my hair was good to use, so I guess I will just use this shampoo when am using the K18 treatment mask. Lately I usually have a bit of oily roots after the day I shower as I do make scalp oiling and hair and feel that other shampoos don’t really get rid of all of the oil, so I feel this shampoo is good to use after oiling hair as it really gets all of the oils out. I have a long and very very thick hair and usually my hair takes long to dry but when I used this my hair dryer very fast. I think this shampoo should be used maybe maximum twice or once a month, as it really does what it say it cleans your hair from everything, and it’s a good thing to use before K18 treatment mask. It’s considered affordable for me the bottle would last me for months personally as I would use it twice a month, I think people who have oily scalp should definitely use it more as usually the second day after I put oil on my hair, my roots are oily, but after I used this one it’s not oily at all.
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Reviewed in the United States on October 3, 2024 by Majd N
The best detox shampoo I have ever used. I have used several brands and this is the only one that does not make my hair feel like the bottom of the broom. I love that it does not take away too much of my hair color, but it properly cleanses with ease, bottle is great quality no leakage. Great value for your money. I would recommend 20/10.
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Reviewed in the United States on September 11, 2025 by Jackeline
I have seborrheic dermatitis and have struggled to find a shampoo that smells decent and works well for flakes. I've tried Selsun Blue, Head and Shoulders, Nizoral, coal tar shampoos including Pete and Pedro Control shampoo. They either don't work or stink to high heaven. I don't know any woman who would be ok with smelling like coal tar for days. This shampoo works well on my thick, color-treated hair and doesn't dry it out. A little goes a long way. It smells ok, not overly perfume-y. K18 is a great line and although pricey, my hair and scalp are the healthiest they've been in a long time!
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Reviewed in the United States on September 15, 2025 by Sonya R