A densifying shampoo that gives fine, thinner-looking hair a fuller look
Redken Acidic Grow Full Densifying Shampoo is a daily shampoo for fine and thinner-looking hair that wants more body and a fuller look. It is the cleansing step of Redken's Acidic Grow Full system, built around caffeine, azelaic acid and salicylic acid to cleanse the scalp and remove build-up at the roots. Fermented actives from bifida ferment lysate and rice ferment filtrate help care for the scalp, while a conditioning guar polymer keeps lengths easy to detangle. Hair is left lighter, bouncier and fuller-looking from the first wash.
How it works
A clear, fresh shampoo with a rich lather and a citrus, herbal scent from lemon, bergamot and orange peel oils. It rinses out cleanly, leaving roots light and full of movement rather than flat or coated.
Who it suits
- Fine or thinner-looking hair lacking volume
- Hair that goes flat quickly at the roots
- Oily or congested scalps that like a deep cleanse
- Anyone starting the Acidic Grow Full routine
Worth knowing before you buy: it contains sulfates and fragrance with essential-oil allergens, so dry, curly or sensitive scalps may prefer a gentler shampoo such as Redken All Soft. It helps hair look fuller.
How long one bottle lasts
Used three to four times a week on medium-length hair, the 300ml bottle lasts around two to three months.
Complete the routine

Acidic Bonding 5-Minute Mask
A weekly repair mask for weakened lengths.
Shop →
Extreme Strengthening Shampoo
To alternate on days hair feels fragile.
Shop →Characteristics
- Texture: clear lathering shampoo
- Hair type: fine, thin or thinner-looking hair
- Hair concerns: lack of volume, flat roots, scalp build-up
- When to use: every wash, or three to four times a week
- Main benefits: deep scalp cleanse, lighter roots, fuller-looking hair
How to use
Apply to wet hair and massage into the scalp to build a lather. Rinse thoroughly. Repeat if needed and follow with a light conditioner on the lengths. Avoid contact with the eyes.
Active ingredients
- Caffeine: a scalp-care active widely used in densifying hair care
- Azelaic acid and salicylic acid: help purify the scalp and lift build-up at the roots
- Bifida ferment lysate and rice ferment filtrate: fermented actives that care for the scalp
- Hydroxypropyl guar hydroxypropyltrimonium chloride: conditions and helps detangle without weighing hair down
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
Formulations are updated by the manufacturer from time to time. Always check the packaging you receive.
Manufacturer information
Brand: Redken
Address: 277 rue Saint-Honoré, 75008 Paris, France
EAN: 3474637325442
