Peptide Prep Detox Shampoo — Reddit Reviews
by K18
Updated November 10, 2026
Salicylic-acid clarifier cuts hard-water and product buildup; too intense for sensitive scalps.
What the community says
A strong clarifying shampoo with salicylic acid, charcoal powder, and peptides for weekly buildup and hard-water resets. Fine, product-heavy hair may love the squeaky-clean finish, but flaky or reactive scalps can end up itchy, dry, and shedding.
What this means for you
What people love
- Salicylic acid clarifies scalp while tackling buildup
- Hard-water helper for mineral buildup
- Squeaky-clean finish without straw-like feel
Watch out for
Product details
Use caution
Key Ingredients
Hair Type
How to use it
From Reddit routinesHow Reddit uses it
Where to buy
Full ingredient list · 18
K18 Peptide Prep Detox Shampoo 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
Listed in label order, highest concentration first. Linked ingredients have their own page.
Real Reddit threads — 108 mentions across 30 threads
K18 Peptide Prep Detox Shampoo on Reddit, in one place — 30 threads from r/Haircare, r/curlyhair and 5 more, summarized.
“I start off with a detox shampoo (currently the K18 as I have t on hand)”
Mentioned
“I forgot to put on that i use k18 detox shampoo when I do the bond treatment every 4 weeks.”
Mentioned
“As its also a chleating shampoo I founds its helped with the hard water in my area.”
Mentioned
“Once a week use the K18 detox shampoo and follow it up with the Ouai hair mask.”
Mentioned
“k18 detox is one I use and recommend 1x a week”
Mentioned
“I had K18 shampoo and conditioner in my Amazon cart.”
Mentioned
“Not anymore.”
Mentioned
“It is too hard to tell whether you’re dealing with a third party seller or a brand page.”
Mentioned
“I use detox shampoo (K18) and it definitely helps but nothing like my parents house where they have a water filtration system.”
Positive
