K18 Peptide Prep Detox Shampoo Review

K18 Peptide Prep Detox is a clarifying shampoo for all hair types and textures, color safe and pH optimized. This shampoo claims to effectively cleanse product buildup, oils, and minerals found in hard water. With a pH of 3.8 to 4.2, this is said to minimize swelling of the cuticle during washing and protects hair’s natural moisture levels. If pH is too high, a shampoo can increase friction, causing frizz and breakage (an interesting read on shampoo, hair and scalp pH from the NCBI).

Ingredients: Water (Aqua) (Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Hydroxysultaine, Salicylic Acid, Charcoal Powder, sh-Oligopeptide-78, Panthenol, Glycerin, Sodium Phytate, Guar Hydroxypropyltrimonium Chloride, Caprylyl Glycol, Caprylhydroxamic Acid, Citric Acid, Potassium Hydroxide, Sodium Hydroxide, Fragrance (Parfum), Benzyl Salicylate, Limonene.

Salicylic acid clears sebum, activated charcoal targets dirt and oils, and this is formulated with the K18 peptide to reduce protein loss for overall hair strength.

Directions: Use weekly or as needed for a heavy-duty cleanse. Massage into hair and scalp to remove excess buildup. Rinse thoroughly. Repeat as needed. Follow with conditioner or the K18 hair mask.

This shampoo is grey in color, has a light citrus scent, and is a little more liquid/runny than other shampoos.

The shampoo creates a big, soft lather that rinses well. The last photo is a blow dry with a round brush after using only the Peptide Prep Detox shampoo and the K18 mask (albeit frizzy, my hair never turns out this nice (by my hair’s usual standards anyway) after blow drying). I would follow with a hair oil or Shu Uemura’s overnight hair serum for the frizz and easy styling.

I have oily scalp and dry, frizzy hair. My hair is not colored. I use about every 1 to 2 weeks (I have used it for about 2 months), followed by the K18 hair mask or my regular conditioner from Snobgirls.

I have used the shampoo on 3-day hair with no product in it and 6-day hair with a buildup of oils and Redken Dry Shampoo Paste. My hair is well cleansed in both scenarios, however, Peptide Prep Detox does not give the hair the extra squeaky-clean feeling of other clarifying shampoos or even the Snobgirls shampoos (which are so good for oily scalp). I would assume this is because of the added K18 peptide, the pH of the shampoo, and the salicylic acid to break down oils, so the hair is not stripped of moisture. As an aside, a great AHA/BHA product for dead skin cells and oil buildup on the scalp is Drunk Elephant’s Happi Scalp. For extra-clean squeaky hair, a long-time favorite is the Living Proof Triple Detox shampoo. What is immediate and very noticeable with Peptide Prep Detox shampoo (which is surprising and I did not expect from a clarifying shampoo) is the softness of the hair, even while damp, and after a blow dry. My hair has body, movement and softness, whether using the K18 mask or my regular conditioner. I also got soft hair using Redken’s All Soft shampoo and conditioner, though the softness is aided by oils and silicone.

The evening before getting a hair cut about a month ago, I used the K18 detox shampoo and mask, and my hairdresser said my hair felt very soft and healthy and asked what I had been using.

K18 Peptide Prep Detox Shampoo cleanses well while maintaining moisture, prepares the hair for the K18 peptide mask, and makes the hair very soft and manageable. I would repurchase.

K18 also has a daily shampoo, Peptide Prep pH Maintenance Shampoo, with a pH of 4.5 to 5.5. I have not tried it yet, but eventually will for sure, hoping that it gives my hair the same softness as the detox shampoo.

Thanks for visiting.