Redken Acidic Grow Densifying Shampoo 33.8 fl oz — Lightweight, Scalp-Balancing Formula for Fuller-Looking Hair

Redken Acidic Grow Full System Densifying Shampoo is a lightweight, scalp-balancing cleanser designed to give thin or thinning hair immediate-looking density while protecting the scalp barrier.

This shampoo is part of Redken’s Acidic Grow Full System and combines a 7% Densifying Complex with a gentle acidic formula to cleanse without over-stripping. It’s formulated to work with color-treated hair and was evaluated in consumer testing that included GLP-1 users. Use it as the first step in the four-piece system for visibly fuller-looking hair and a healthier-feeling scalp.

How does this shampoo create a fuller-looking effect?

The formula targets surface volume and scalp condition rather than altering hair structure permanently. Lightweight film-forming and densifying ingredients lift strands at the root and add temporary thickness for an immediate visual boost.

• 7% Densifying Complex for root lift and strand thickening
• Acidic pH to smooth cuticles and increase shine
• Non-stripping cleansing preserves natural scalp oils
• Works best when paired with the full Acidic Grow system

Will it irritate or dry out my scalp?

The formula is designed to gently cleanse while maintaining the scalp’s protective barrier, reducing the risk of dryness and irritation compared with harsher shampoos. It includes ingredients that rebalance and help the scalp feel healthier after use.

• Gentle surfactants remove buildup without aggressive stripping
• Scalp-rebalancing actives to support hydration and comfort
• Suitable for routine use without compromising the barrier

Is this shampoo safe for color-treated hair and sensitive routines?

Yes—Redken formulated this shampoo to be color-safe and compatible with regular salon color services. Its acidic profile helps smooth the hair surface, which can prolong color vibrancy and reduce frizz.

• Color-safe formulation to protect salon-treated hair
• Acidic pH smooths cuticles and enhances shine
• Lightweight, non-greasy finish keeps color luminous

How should I use it for the best results?

Use this shampoo as the first step in the Acidic Grow Full System for optimal densifying results. Follow with the conditioner and targeted scalp serum, and finish styling with the Instant Densifying Spray to amplify the volumizing effects.

• Apply to wet hair, lather, and rinse; repeat if needed
• Pair with Acidic Grow conditioner and scalp serum for system benefits
• Finish with Instant Densifying Spray for added root lift

Who is this for:

This shampoo is aimed at people with fine, thin, or flattening hair who want immediate-looking density and a healthier-feeling scalp. It’s suitable for daily or regular use, works with color-treated hair, and is often chosen by those concerned about thinning associated with lifestyle or treatment changes. If you prefer lightweight products that add visible body without heavy residue, this Redken Acidic Grow Full System Densifying Shampoo is a targeted option when used as part of the complete system.

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