L'Oreal Professionnel Serie Expert Metal Detox Mask is a salon-grade hair mask powered by Glicoamine, formulated to neutralise the copper and metal particles that tap water deposits inside the hair fibre. Those trapped metals are what turn coloured hair dull, brassy, and prone to snapping. Used after every wash, this rich 250ml treatment protects colour, restores softness, and strengthens strands against breakage.

Why This Hair Mask Works

Metal particles from pipes and tap water build up inside the hair fibre wash after wash. When they meet colour or lightener during a salon service, they trigger a reaction that causes breakage and unreliable colour results. Glicoamine is small enough to penetrate the fibre, trap those metals, and coat the strand so new deposits cannot settle. Hair is left less porous and better protected.

Proven Results

L'Oreal instrumental testing on the Metal Detox shampoo and mask used together reports up to 87% less hair breakage and hair looking up to 2x shinier after a single use. The mask on its own is tested to deliver up to 100 hours of hydration and a 96% improvement in softness.

Ideal For

• Coloured, balayaged, or bleached hair that fades or turns brassy between salon visits

• Hard water and older building pipework, where metal buildup is unavoidable

• Dry, porous, over-processed hair that snaps when brushed or heat-styled

• Anyone completing the at-home Metal Detox routine after the shampooSuitable for all hair types and textures. If you have no colour history and soft water, a standard moisturising mask may be enough.

• Glicoamine: The patented active at the heart of the Metal Detox range, and the only agent small enough to trap and neutralise metal inside the hair fibre.

• Amodimethicone and Cetearyl Alcohol: Conditioning agents that smooth the cuticle and leave hair detangled and glossy.

• Tocopherol (Vitamin E) and Glycine: Support fibre condition and help protect against oxidative stress.

The formula carries a citrus-woody scent of grapefruit flower, salty bergamot, and guaiac wood. Full INCI is printed on the pack.

1. Wash with L'Oreal Professionnel Metal Detox Shampoo for the full protocol.

2. Towel-dry hair, then apply the mask evenly through mid-lengths and ends.

3. Leave on for one minute, or up to fifteen minutes for a deeper treatment.

4. Rinse thoroughly and style as usual.

Use after every shampoo if your hair is coloured, bleached, or breakage-prone. A little goes a long way, so 250ml stretches across many washes.