PEPTIDE PREP™ Color-Safe Detox Clarifying Shampoo, Non-Stripping, pH-Optimized Cleanse, Removes Product Buildup, Dirt, Oils & Metals

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)

I just used this K18 Detox Shampoo and I could see and feel the difference instantly. Even though it’s a detox shampoo, it didn’t leave my hair dry or stripped at all. My hair feels incredibly clean, light, and soft at the same time. What I love most is the fresh, healthy feeling it leaves on my scalp and hair — it feels like a true reset without that harsh, squeaky dryness that most clarifying shampoos cause. My hair looks smoother, shinier, and much easier to manage after just one use. I’m not an influencer, just a real buyer, and I’m honestly impressed with how well this works. If you’re dealing with buildup or want your hair to feel clean and healthy again, this is absolutely worth it.

I use this shampoo on my natural hair and my wigs when I have build up in my hair and it leaves my hair and wigs super clean and buildup free. It is drying though so make sure to follow up with a good conditioner! But effective for sure!

It is pricy, so I got it on prime day. However, it is worthy the price. Follow the instructions, use it once a week, you can feel the cleanness of scalp.

This K18 clarifying shampoo is amazing. It deeply cleans my scalp and removes buildup without drying out my hair or fading my color. My hair feels lighter, softer, and noticeably healthier after just one use. A must-have for color-treated hair.

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.

AI actually selected this shampoo for me after I answered questions and took pictures of my s alp and hair. It’s been two weeks, and major difference in the quality of my hair. I also use a clarifying shampoo once a month. But this shampoo makes my hair thicker, softer, more volume, and hydrated! I also have really oily hair and I only have to wash twice a week and my hair doesn’t get oily! My hair is bright and shiny too!

fixed my hair!! i had a bad wax feeling spot on the top back of my scalp and this shampoo fixed it in one wash! i pair it with redken conditioner and it made my hair unbelievably soft !