Olive Young best seller#3 on Olive Young

Treatroom The More Black Shampoo

Treatroom The More Black Shampoo
Our read

Why our pick wins

A basic-dye toning shampoo — no PPD, resorcinol or peroxide, so it screens clean. But it deposits semi-permanent tone that builds gradually and washes out; ours is a one-wash, fuller grey cover.

Screening score

How they compare

Treatroom The More Black Shampoo 8.2 / 10
GDS Hair Dye Shampoo — Grey Coverage in 3 MinutesDHALIORA pick 8.6 / 10
GDS Hair Dye Shampoo — Grey Coverage in 3 Minutes See the DHALIORA pick GDS Hair Dye Shampoo — Grey Coverage in 3 MinutesScreening score 8.6 / 10
What's inside

Ingredient breakdown

28 ingredients screened

Low
Low
Coco-Betaine
Mild Surfactant
Mid
Low
Sodium Benzoate
Preservative
Low
Decyl Glucoside
Mild Surfactant
Low
Cocamide MEA
Foam Booster
Mid
Glycerin
Humectant
Low
Low
Low
Salicylic Acid
BHA Exfoliant
Mid
1,2-Hexanediol
Preservative
Low
Low
Citric Acid
pH Adjuster
Low
Niacinamide
Brightening
Low
Polyquaternium-7
Conditioning
Low
Hexylene Glycol
Humectant
Low
Caffeine
Conditioning
Low
Biotin
Anti-Hairloss Functional
Low
Butylene Glycol
Humectant
Low
Mid
Ethylhexylglycerin
Preservative
Low
Low
Low
Low
Low
Low
Low
About this comparison — This is an editorial, factual comparison. Ingredient risk reflects our own reading of publicly available safety data, an EWG-style reading. DHALIORA is not affiliated with, endorsed by, or partnered with the competitor brand. Nothing here is medical advice — always read the packaging and patch-test where indicated.