Redken Acidic Grow Densifying Shampoo 10.1 fl oz — Lightweight, Azelaic Acid Scalp Care for Fuller-Looking Hair

Redken Acidic Grow Full System Densifying Shampoo is a lightweight, scalp-friendly cleanser formulated with a 7% Densifying Complex and azelaic acid to help hair look fuller and support a balanced scalp.

This gentle shampoo is designed for thin, thinning, or flat hair and is part of Redken's Acidic Grow Full System. It removes buildup without stripping the scalp’s natural barrier, delivers instant volumizing benefits when used with the complete system, and was evaluated in consumer testing that included GLP-1 users. The formulation targets lightweight cleansing, scalp rebalancing, and cosmetic densifying effects while remaining safe for color-treated hair.

How does this shampoo help hair appear fuller right away?

The formula includes a 7% Densifying Complex that creates lightweight body and lift at the root for immediate visual fullness when paired with the rest of the Acidic Grow Full System. The effect is cosmetic—designed to thicken the look and feel of hair without heavy residue.

• Instant volumizing effect for air-dry or styled hair.
• Light cleansing that avoids weighing the hair down.
• Works best when used with conditioner, serum, and densifying spray from the same system.

What ingredients should I know about, and how do they act on scalp and strands?

The shampoo combines a densifying complex with azelaic acid, chosen to help rebalance the scalp environment and gently cleanse. Ingredients are blended to lift hair at the root while maintaining the scalp’s protective barrier, making the product suitable for routine use.

• 7% Densifying Complex to boost cosmetic thickness and body.
• Azelaic acid for scalp-rebalancing benefits without harsh stripping.
• Formulated to be color-safe and lightweight to preserve hair texture.

Is this safe for color-treated hair and people using GLP-1 medications?

Yes—Redken formulates the Acidic Grow Full System Shampoo to be safe for color-treated hair. The product was also consumer-tested with GLP-1 users; results indicated a high percentage of those participants perceived thicker-feeling hair when using the full system. Always patch-test new products and consult your healthcare provider about specific drug interactions if you have concerns.

• Color-safe formulation to protect dye vibrancy.
• Included in consumer testing that involved GLP-1 users.
• Recommended to combine with the system’s conditioner, serum, and spray for maximal cosmetic impact.

How should I use it for the best results?

Wet hair thoroughly, apply a small amount of shampoo, massage into the scalp to lift and cleanse, then rinse. For noticeable fullness and scalp support, follow with Redken Acidic Grow Full System Conditioner and Scalp & Hair Serum; finish with the Instant Densifying Spray when styling.

• Use daily or as needed to remove product and environmental buildup.
• Pair with the full Acidic Grow Full System for optimal densifying effects.
• Style as usual; works with heat styling and air-drying.

Who is this for: Redken Acidic Grow Full System Densifying Shampoo is made for people with thin, thinning, or flat hair who want a lightweight cleanser that supports a balanced scalp and cosmetic fullness. It’s appropriate for color-treated hair and for consumers looking to integrate a targeted, routine-friendly product into a larger densifying system. If you are seeking medical treatment for hair loss, consult a professional—this shampoo is formulated for cosmetic improvement and scalp care within a haircare regimen.

Ingredients

AQUA / WATER / EAU, SODIUM LAURETH SULFATE, COCAMIDOPROPYL BETAINE, SODIUM CHLORIDE, PROPYLENE GLYCOL, PARFUM / FRAGRANCE, CITRIC ACID, COCAMIDE MEA, SODIUM BENZOATE, SODIUM HYDROXIDE, HEXYLENE GLYCOL, BIFIDA FERMENT LYSATE, SACCHAROMYCES/RICE FERMENT FILTRATE, SODIUM LAURYL SULFATE, HYDROXYPROPYL GUAR HYDROXYPROPYLTRIMONIUM CHLORIDE, CAFFEINE, AZELAIC ACID, LINALYL ACETATE, CARVONE, PENTYLENE GLYCOL, LINALOOL, LIMONENE, CITRUS LIMON PEEL OIL, CITRUS AURANTIUM BERGAMIA PEEL OIL, CITRAL, CITRUS AURANTIUM PEEL OIL, PINENE, PHENOXYETHANOL, SALICYLIC ACID