Redken Acidic Grow Full System Scalp Hair Serum 100mL

Is this product for you?
• Fine, thin or flat hair needing more fullness
• Hair prone to breakage from brushing
• Want to care for both your scalp and hair strength
• Looking for a lightweight leave-in that won’t weigh down your roots
• Suitable for colour-treated hair

Redken Acidic Grow Full System Scalp & Hair Serum is a lightweight leave-in scalp and hair treatment designed to help strengthen fine, fragile hair while supporting a balanced, hydrated scalp. Formulated with Redken’s 5% Strength Complex, it helps rebalance the scalp’s pH, add moisture and strengthen the hair fibre for denser, thicker and healthier-looking hair.

When used as part of the complete Acidic Grow Full System, it provides the appearance of fullness equivalent to +5,000 hair fibres.*

Why we love it:
✔️ Strengthens Hair – Helps reinforce fragile hair fibres and reduce breakage
✔️ Instant Fullness – Supports fuller, thicker-looking hair as part of the complete system
✔️ 2x Stronger Hair – Helps strengthen hair when used as part of the four-step routine
✔️ 2x Less Breakage – Helps reduce breakage caused by brushing
✔️ Scalp Care – Helps rebalance the scalp’s acidic pH while adding hydration
✔️ Lightweight Formula – Designed for fine and flat hair without weighing down the roots
✔️ Colour-Friendly – Suitable for colour-treated hair

Perfect Pair:
Use after Redken Acidic Grow Full Densifying Shampoo & Conditioner, then finish with Acidic Grow Full Densifying Spray through the lengths before styling. Together, the four-step system targets scalp care, strength, breakage and visible density.

Who’s it for:
Fine & Thin Hair – Supports stronger strands and a fuller-looking finish
Breakage-Prone Hair – Ideal for fragile hair experiencing breakage from brushing
Flat Hair – Lightweight enough to use at the scalp without creating heaviness
Scalp Care – Perfect if you want your density routine to include scalp hydration and pH care
Colour-Treated Hair – Suitable for coloured strands while supporting strength and fullness

How to use:

1. Use on damp or dry hair
2. Spray directly onto the scalp and roots from approximately 2–3cm away
3. Use your fingertips to gently massage the serum into the scalp
4. Do not rinse
5. Style as usual, finishing with Acidic Grow Full Densifying Spray for added fullness

What’s inside:
Powered by Redken’s 5% Strength Complex and Azelaic Acid to help rebalance the scalp’s acidic pH while supporting stronger, denser-looking hair.

Finished with the Acidic Grow Full signature warm citrus fragrance of Italian Lemon, Neroli and Vanilla Bean.

Tip:
This is the step you don’t rinse out. Apply directly to the scalp and roots and give it a quick massage to distribute. And remember... Acidic Grow Full is designed to strengthen your existing hair and reduce breakage so it appears fuller and thicker; it does not grow new hair. And just because it is a serum, that doesn't mean oily scalp.

*When using the complete system of Acidic Grow Full Shampoo, Conditioner, Serum and Spray.