Support fuller, thicker hair with Redken Acidic Growth System Serum. Ideal for fine, flat hair or hair prone to breakage and fall from brushing, this serum hydrates and rebalances the pH of the scalp to improve strength and resilience. 

Why you’ll love it:

• Helps create the appearance of fuller, denser hair
• Supports a healthy, balanced scalp environment
• Strengthens hair to help reduce breakage
• Lightweight leave-in formula with no rinsing required
• Suitable for colour-treated hair
• Ideal for daily scalp care

Designed for thin, flat hair prone to hair fall due to breakage from brushing, this targeted serum helps care for both the scalp and hair. Formulated with Azelaic Acid, it helps rebalance the scalp's natural acidic pH mantle to create the ideal environment for healthier-looking hair while supporting stronger, more resilient strands.

Its lightweight formula absorbs quickly without leaving residue, making it easy to incorporate into your daily routine while helping hair look fuller and feel revitalised.

How to use:

Spray onto the scalp and roots from approximately one inch away on damp or dry hair. Gently massage into the scalp using your fingertips and do not rinse. Style as usual. For best results, use with the complete Redken Acidic Growth System routine, including the Densifying Shampoo, Conditioner and Instant Densifying Spray.