L'Oréal Professionnel Serioxyl Denser Hair Serum 90ml

Why you'll love it

• A professional leave-in serum for very fine or thinning hair
• Helps hair look denser and feel fuller, wash after wash
• Formulated with Stemoxydine and Resveratrol, backed by years of L'Oréal research
• Resveratrol helps protect against oxidative stress*
• Precise pipette applicator for quick, accurate application

Fuller-feeling, denser-looking hair from a professional favourite. L'Oréal Professionnel Serioxyl Denser Hair Serum is a leave-in super serum for anyone with very fine or thinning hair who wants more visible density and body. Formulated with Stemoxydine and Resveratrol, ingredients drawn from L'Oréal's long-running research, it helps leave hair looking denser and feeling fuller. The precise pipette applicator makes it quick and easy to apply exactly where you want it.

What it does for your hair

Fine and thinning hair can look flat and lack visible density. This serum is designed to help address the look and feel of that: Resveratrol helps protect against oxidative stress*, while the overall formula works to leave hair looking denser and feeling fuller and more substantial. Applied directly to the scalp and hair with the pipette, it's a targeted, leave-in step that helps fine hair look and feel like there's more of it.

How to use it

Apply to clean, towel-dried hair. Using the pipette, distribute the serum across the scalp section by section, then massage in gently with the fingertips. Do not rinse out. Style as usual. Use regularly as part of your routine, consistency is key with a leave-in treatment like this.

Who it's for

This one's for anyone with very fine or thinning hair who wants a professional leave-in step to help their hair look denser and feel fuller. We've been perfecting colour, blow-dries and styling for clients in Codsall for years, and the right density-boosting serum can make a real difference to how full fine hair looks and behaves.

Build your routine

Get the most from the serum by pairing it with a density-focused wash. Find a suitable shampoo in our shampoo collection, explore more treatments across our hair products, or browse our shop by brand pages for your favourites.

Free UK delivery on all orders.

*Resveratrol helps protect against oxidative stress. This is a cosmetic hair and scalp serum intended to improve the look and feel of fine or thinning hair; it is not a medicine and is not intended to treat hair loss or any medical condition. If you are concerned about hair loss, we'd recommend speaking to your GP, pharmacist or a trichologist. If you have a sensitive or irritated scalp, patch test before use and discontinue if irritation occurs.