Redken Acidic Grow Full Densifying Shampoo
- Salicylic acid cleansing formula
- Gentle on the scalp barrier, thin or flat hair
- Safe for color treated hair
- 300 ml (10.1 fl oz), citrus scent
- Step 1 of the 4-step Acidic Grow Full system
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A gentle densifying shampoo for thin or flat hair that cleans without stripping the scalp. It works as the first step in a four-part system, which carries the thickening claims.
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ASIN: B0GD2JW8WJCategory: Hair Shampoos
Overview
Someone noticing thinner or flatter hair gets a light shampoo with salicylic acid that cleans the scalp without stripping its protective barrier. It adds a volumizing feel and starts the Acidic Grow Full routine.
A clean scalp and lift at the root give fine hair a better start, and the formula stays gentle. Thicker-looking results are claimed only with the full four-product system.
Who it's for
People with thinning-looking hair who will use the matching conditioner, serum and spray get the full effect. Those after a single rich shampoo for dry hair should look elsewhere.
Pros and cons
- Gentle on the scalp barrier
- Salicylic acid for scalp cleansing
- Light, no heavy residue
- Claims rely on the full system
- Directions beyond the system order not listed
Performance notes
Salicylic acid loosens buildup on the scalp so roots lift more easily after washing. A light formula avoids coating fine strands. The thicker-looking effect is measured across the full routine, so results alone are milder.
Specifications
| Brand | Redken |
|---|---|
| Dimensions & fit | |
| Item dimensions | 2.19 x 2.56 x 6.25 inches |
| Item Weight | 300 milligrams |
| Capacity & performance | |
| Liquid Volume | 300 ml (10.1 Fluid Ounces) |
| Age Range Description | Adult |
| Construction & materials | |
| Suitable Hair Color | Color treated safe |
| Other details | |
| Hair Type | All, thin, thinning or flat |
| Active Ingredients | Salicylic acid |
| Item Form | Liquid |
| Scent Name | Citrus |
| Product Benefits | Cleansing, volumizing effect |
| Collection Name | Acidic Grow Full |
Frequently asked questions
How do I use Redken Acidic Grow Full Shampoo?
The listing recommends the full system in order: (1) Shampoo, (2) Conditioner, (3) Scalp and Hair Serum, (4) the densifying spray.
Is Redken Acidic Grow Full Shampoo harsh on the scalp?
The bullets say it cleanses without stripping the scalp's protective barrier.
How much is in the Redken Acidic Grow Full Shampoo?
300 ml, or 10.1 fluid ounces.