Anyone with colour-treated hair: permanent or demi colour, highlights, balayage, bleached or otherwise chemically treated hair that feels dry or has started to look dull. It suits people who blow-dry or flat iron regularly and want a heat protectant and moisturiser in one step.

It is a retail leave-in product for home use and works in any routine, with or without the matching Hyloren Color Save shampoo and mask. Because only a few pumps are needed, it can be used on fine colour-treated hair as well as thicker lengths; adjust the amount to your hair density.

Most colour-protecting products work in the shower and stop there, but a lot of colour fade happens later, under the blow dryer and flat iron. Hyloren Color Save Hair Serum is meant for that moment: a few pumps before styling put a hyaluronic acid layer of moisture into dry, coloured lengths and a polymer shield over the cuticle, so the hair is protected from heat and the colour is less exposed. The result Mon Platin describes is smoother, shinier hair with colour that stays vibrant longer, and since it absorbs quickly it fits into a daily routine without weighing hair down.

Use on damp or dry hair before heat styling.

• Dispense 2 to 3 pumps into your palm (fewer for short or fine hair, more for long or thick hair).
• Distribute evenly through the lengths and ends.
• Blow-dry or flat iron as usual; do not rinse out.
• Use daily for the best colour protection. For a full routine, pair with the Hyloren Color Save Shampoo and Hair Mask.

Pros:

• Two jobs in one product: heat protection up to 450°F plus hydration, so colour-treated hair gets moisture and protection before styling.
• Designed to seal the cuticle, which helps colour hold its tone longer between salon visits.
• Quick-absorbing texture that the brand says leaves no greasy film.
• Pump bottle makes it easy to dose 2 to 3 pumps consistently.

Cons:

• 50 ml is a small bottle if you have very long or thick hair and use it daily.
• A full ingredient list is not published online, which makes it harder for people with sensitivities to check before buying.
• It is a protecting and finishing serum, not a bond-building treatment, so heavily over-processed hair will still need a repair mask.