Redken Acidic Grow Full Scalp & Hair Serum is a leave-in scalp spray for thin hair that rebalances scalp pH and adds moisture, helping hair look fuller and feel stronger. It is the treatment step of the Acidic Grow Full System, with a 5% Strength Complex built around Azelaic Acid+, hyaluronic acid and caffeine.

The serum comes in a 3.4 oz (100 ml) bottle with a nozzle that places the formula right on the scalp. It is lightweight and non-greasy, so it can go on clean, damp hair after washing or on a dry scalp between washes, and it is suitable for colour-treated hair.

• Instant rebalancing, moisturizing effect on the scalp
• Lightweight, non-greasy finish
• 2x stronger hair when used with the shampoo and conditioner (versus a non-conditioning shampoo)
• Scalp clinically tested to feel hydrated with the shampoo, conditioner and serum

Redken recommends it for thin, flat hair prone to breakage. It supports a healthy-feeling scalp and fuller-looking hair; it is a cosmetic product, not a treatment for hair loss.

Aqua / Water / Eau, Glycerin, Hydroxyethylpiperazine Ethane Sulfonic Acid, Caffeine, PEG-40 Hydrogenated Castor Oil, Sodium Hyaluronate, Phenoxyethanol, Citric Acid, Bifida Ferment Lysate, Saccharomyces / Rice Ferment Filtrate, Chlorphenesin, Propylene Glycol, Parfum / Fragrance, Tetrasodium Glutamate Diacetate, Pentylene Glycol, Azelaic Acid, Linalyl Acetate, Carvone, Linalool, Limonene, Citrus Limon Peel Oil, Citrus Aurantium Bergamia Peel Oil, Sodium Benzoate, Citral, Citrus Aurantium Peel Oil, Pinene