Kerastase

Kerastase Blond Absolu Bain Ultra-Violet.

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About this product

A purple-toned shampoo designed to neutralize yellow and brassy tones in blonde and gray hair while adding shine.

Full ingredients

Aqua/Water, Sodium Laureth Sulfate, Coco-Betaine, Sodium Chloride, Glycol Distearate, Cocamide MIPA, Dimethicone, Citric Acid, Sodium Benzoate, Sodium Hydroxide, Hexylene Glycol, Ci 60730/Acid Violet 43, Salicylic Acid, Carbomer, Limonene, Guar Hydroxypropyltrimonium Chloride, Hydroxypropyltrimonium Hydrolyzed Wheat Protein, Magnesium Acetate, Glycerin, Sodium Hyaluronate, Tocopherol, Aspartic Acid, Glycine, Arginine, Glutamic Acid, Phenoxyethanol, Leontopodium Alpinum Flower/Leaf Extract, Fumaric Acid, Malva Sylvestris Flower Extract/Mallow Flower Extract, Potassium Sorbate, Parfum/Fragrance

Guru Score

84%

Yay

Early verdict · Few reviews so far

What they liked

Adds shine to blonde hair
Pigmented enough to neutralize brassiness
Removes yellow tones effectively

What they flagged

Pricey

What the gurus are saying

This pigmented purple shampoo earns praise for effectively neutralizing brassiness and yellow tones in blonde and gray hair. Gurus highlight its rich color payoff and the noticeable shine it adds, though they note it comes at a premium price point. Those with brassy hair looking for visible tone correction may find it worth the investment.

Synthesized from 2 expert reviews · most recent take February 2026

Type

Liquid

Key actives

Hyaluronic acid Salicylic acid (BHA)Vitamin E

Formula notes

Contains fragranceNo drying alcohol

Where to buy

Sephora → Amazon → Google →

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What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Yay takes Nay takes Mixed takes Hide sponsored

Sincerely Miss Ash

195k subs

✓Yay

"I really love that shampoo as well and I use it all the time and it adds a lot of shine to my hair"

Beyond50Skin

32k subs

✓Yay

"Carto makes my absolute favorite purple shampoo for gray hair. It's their Bain Ultra because they have two, not the clear one. This is the one that's really pigmented and it just is the right color for my brassiness to get the yellow out of my hair. I love it and it's not cheap."

What the evidence says.

Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

Salicylic acid

Salicylic acid dissolves in oil, so it can get into a pore rather than just working on the surface. That is why it has long-standing evidence for blackheads and milder acne.

Source: DermNet

Humectants and emollients

Ingredients like these draw water into the surface layers and slow how fast it leaves. The evidence is for comfort, softness and hydration rather than for changing the structure of the skin.

Source: DermNet

Vitamin E

Vitamin E is an antioxidant, and it is often in a formula to keep the other ingredients stable rather than as the active itself. It pairs well with vitamin C, though on its own the evidence for visible change is limited.

Source: NIH, National Library of Medicine

Frequently asked.

What is Kerastase Blond Absolu Bain Ultra-Violet?

A purple-toned shampoo designed to neutralize yellow and brassy tones in blonde and gray hair while adding shine.

Is Kerastase Blond Absolu Bain Ultra-Violet worth it?

Yes. All 2 gurus who reviewed it give it their stamp of approval, for a Guru Score of 84%.

What is Kerastase Blond Absolu Bain Ultra-Violet's Guru Score?

Kerastase Blond Absolu Bain Ultra-Violet holds a Guru Score of 84%. That is our read on how warmly the experts talk about it, based on the verdicts of 2 expert reviewers we have collected.