Redken Acidic Grow Full System Densifying Shampoo

Oily scalps, heavy product users and people who like a strong cleanse.

May feel too cleansing for some dry, curly, colour-treated or sensitive hair types. This depends on the full formula and your hair needs.

Most hair types, including those wanting a gentler wash.

Often paired with other surfactants to make a formula feel milder.

Those interested in how a product’s texture and lather are achieved.

It is a simple mineral salt that helps create a familiar shampoo feel and can influence how a cleanser spreads through the hair.

Most hair types as part of a moisturising formula.

A widely used humectant and carrier ingredient.

Most hair types as part of a balanced formula.

Usually present in small amounts to balance the formula.

Those who prefer shampoos with a richer, creamier foam.

It is made from fatty acids derived from coconut oil and monoethanolamine and is commonly used to stabilise foam and improve texture. It can also help thicken surfactant-based formulas.

All products that need a preservative system.

Often paired with other preservatives for broad protection.

Those interested in how product pH affects scalp comfort or hair cuticle behaviour.

It is used in very small amounts to bring a formula to the desired pH range. Once adjusted, it does not act as a strong alkaline agent in the finished product.

Those using stylers, treatments or serums that rely on smooth, even application.

It is commonly used in both leave-in and rinse-off products to support stable, easy-to-apply textures. It can also assist with product absorption and consistency.

Oily scalps and routines that need a strong, clarifying wash.

Can be more cleansing than gentler surfactants. Many people use it happily, while others prefer milder options for everyday washing.

People looking for smoother, easier-to-detangle hair, including those with dry, damaged or textured hair.

It is commonly used in shampoos and conditioners to improve slip and manageability without adding heaviness. Its cationic nature helps it adhere lightly to the hair surface for a conditioning effect.

People interested in scalp-focused formulas or products aimed at maintaining the appearance of fuller, energised hair.

It is often included in shampoos, tonics and leave‑ins to complement other scalp-care ingredients. Its effects are generally most noticeable when used consistently.

Those who enjoy naturally inspired, aromatic formulas.

It is a naturally occurring component of several essential oils and is often used to create balanced, pleasant scents in formulations. Its presence does not affect the performance of the product on the hair.

Those seeking lightweight hydration without heaviness.

It also supports product texture and can enhance the performance of other ingredients in a formula.

A fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.

A fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.

Those who enjoy naturally derived citrus fragrances in their hair products.

Like many essential oils, it can also contribute light aromatic or sensory benefits beyond scent. Its natural composition includes common fragrance components, which may be relevant for people monitoring fragrance use.

Those who enjoy naturally derived citrus scents in haircare.

Bergamot peel oil is an essential oil commonly used to add a bright, uplifting fragrance to formulations. It may also offer a subtle smoothing effect depending on the blend.

Those who enjoy citrus-style fragrances or want products with a fresh aromatic profile.

Citral is naturally present in several essential oils and is listed on labels because it is a recognised fragrance allergen. Only small amounts are typically used to adjust or enhance a product’s scent.

Those who enjoy naturally derived citrus fragrances.

As an essential oil, it contributes scent and may also offer a light refreshing feel in formulations. It can naturally contain trace levels of common fragrance allergens, which are listed separately on ingredient labels when present above threshold levels.

Those who enjoy crisp, outdoorsy fragrance notes in their hair products.

It occurs naturally in many essential oils, especially pine and conifer sources. In formulations it is used mainly for its scent rather than for hair-conditioning effects.

All products that need protecting from spoilage.

A very common, well-studied preservative used at low levels.

People dealing with flaky scalps, congestion or product buildup.

It is widely used in scalp-care formulas because it breaks down excess oils and debris without needing physical scrubbing. Often found in dandruff-control products.