Acidic Grow Full System Scalp & Hair Serum is a leave-in scalp treatment from Redken formulated around azelaic acid and caffeine as part of the brand's pH-balanced "Acidic" range. It's designed to rebalance scalp pH and moisture while supporting a healthier-looking scalp environment, which Redken positions as a foundation for fuller-looking, thicker-feeling hair over time.
The formula pairs azelaic acid with caffeine, sodium hyaluronate for moisture, and fermented ingredients (bifida ferment lysate and saccharomyces/rice ferment filtrate) intended to support scalp condition alongside the pH-balancing base. It's lightweight and leave-in, so it doesn't need to be rinsed out, and it's built to sit on the scalp and roots rather than through the mid-lengths and ends.
This is a professional Redken formula sold through both salons and Redken's consumer channels, so it's intended for regular at-home use between salon visits rather than a one-time in-salon-only treatment.
- Leave-in, pH-balanced scalp and hair serum
- Formulated with azelaic acid, caffeine, and sodium hyaluronate
- Designed to rebalance scalp moisture and support a healthier-looking scalp
- Lightweight enough for daily use on dry scalp
