Redken Volume Injection Shampoo Review: Salon-Clean Volume For Fine Hair

From the first pour, this doesn’t feel like a minimalist shampoo. The formula is creamy, slightly pink, and almost lotion-like, slipping through the fingers with a weight that feels reassuringly professional rather than watery. On contact with wet hair, it blossoms into a fine, dense lather that spreads quickly from roots to mid-lengths, even when we used only a pea- to dime-sized amount.

The scent is where Volume Injection makes its boldest statement. Despite the "unscented" listing, in practice we experienced a pronounced salon fragrance: a powdery floral with rose and soft lavender nuances, underscored by a musky, almost vintage perfume character. On some mornings it felt chic and nostalgic, like walking into an old-guard European salon; on others, especially for our fragrance-sensitive testers, it veered into overpowering and even headache-inducing territory. The scent lingers lightly on dry hair—enough that you catch it when you move or heat-style—but it isn’t as suffocating once hair is fully dry.

Once rinsed, hair under the water stream feels clean and a touch “swollen”, as if each strand has a bit more presence between the fingers. On finer, less damaged hair, that translated to silky slip at the roots and easier detangling. On drier or highlighted ends, we occasionally felt that telltale squeak and slight roughness that demanded a conditioner or leave-in. After drying, the payoff is a soft, airy finish rather than crunchy or gritty volume—more bouncy blowout than texturizing spray.

Our performance analysis reveals that Volume Injection’s lift isn’t magic; it’s smart chemistry tailored to fine hair. The formula leans on filloxane and a bodifying complex (including lightweight silicone polymers) to subtly expand and support the hair fiber, particularly at the roots. In practice, we noticed that hair felt slightly thicker in the hand when wet, and that sensation translated into a fuller silhouette after styling.

The cleansing base uses sulfate surfactants (Sodium Laureth Sulfate and Sodium Lauryl Sulfate) for that thorough, high-foam wash you expect from a salon shampoo. This is a double-edged sword: it’s excellent for cutting through oil, dry shampoo, and styling residue on fine, easily weighed-down hair, but can be too assertive for fragile or heavily processed lengths. Salicylic acid offers gentle scalp exfoliation, helping to dislodge oil and buildup at the roots—something our oilier-scalp testers particularly appreciated.

We also noted silicone polymers in the bodifying complex. These are not the heavy, smothering silicones that make fine hair collapse; they’re lighter, designed to smooth the cuticle, reduce tangling, and create a polished surface that reflects light. When we paired the shampoo with a clarifying wash once in a while, buildup never became an issue. However, for those who avoid silicones or sulfates on principle, this formula won’t align with a strictly “clean” routine.

It is paraben-free and pH-balanced, but does include fragrance, denatured alcohol, and isothiazolinone preservatives—ingredients that some sensitive scalps react to. In our lab, the pattern was clear: resilient, oil-prone fine hair thrived; reactive, eczema-prone or very dry scalps occasionally pushed back.

We didn’t test Volume Injection in a vacuum; we put it through its paces across a spectrum of hair types to see where it shines and where it stumbles.

Fine, flat, or thinning hair: This is the sweet spot. On baby-fine, straight or slightly wavy hair, especially where density is low or aging, we consistently saw a visible lift at the roots and more halo-like fullness around the head. Hair felt lighter, less coated, and styles—whether a simple round-brush blowout or a rough dry—held their shape with less effort. Several testers with breakage- and tangle-prone hair also noticed fewer knots and an overall healthier look after a few weeks.

Fine but oily roots / combination hair: Here, results were more nuanced. Many of our oilier-scalp testers loved how clean their roots felt and found they could stretch an extra day between washes. Others, however, experienced the opposite: hair looked fantastic on day one, then tipped into greasy or heavy territory by the next morning, especially if they used too much product or didn’t rinse meticulously. Technique mattered—concentrating on the scalp, using minimal product, and avoiding over-conditioning the crown made a significant difference.

Thick, coarse, curly, or coily hair: This is where the formula felt miscast. On naturally textured or dense hair, the sulfates and bodifying agents tended to leave lengths feeling rough, frizzy, or overly stripped, with little to no meaningful volume payoff. Our curly testers generally preferred more moisturizing, curl-specific formulas and found this better suited as an occasional deep cleanse rather than a daily staple.

Heavily colored or fashion-toned hair: While the brand positions this as safe for color-treated hair, we did see some trade-offs. On natural or subtly highlighted hair, color held up reasonably well. On vivid or red-based tones—think magentas, purples, and bright fashion shades—the cleansing strength and sulfates accelerated fading and, in one case, visibly shifted a purple to a cooler denim tone. If you invest in high-maintenance color, we’d reserve this for occasional volume days rather than every wash.

With this shampoo, how you use it is almost as important as the formula itself. When we treated it like a drugstore wash-and-go, results were mixed; when we respected it as a concentrated professional product, the performance improved dramatically.

Our ideal ritual:

1. Pre-wet thoroughly: Saturate hair and scalp with lukewarm water. Fine hair, especially at the crown, needs to be fully soaked for the formula to spread evenly.
2. Use less than you think: Start with a pea- to dime-sized amount in your palm. Rather than rubbing it into a froth between your hands, we found better results when we placed small dots directly at the scalp—top, crown, sides, and nape.
3. Scalp-only massage: Massage with fingertips for 30–60 seconds, focusing on the roots. Let the lather naturally cascade through mid-lengths and ends as you rinse; there’s rarely a need to scrub the lengths with this level of cleansing.
4. Rinse patiently: Because the formula is rich, we made a point of rinsing until the water ran completely clear and hair felt clean but not squeaky. Incomplete rinsing was a common culprit behind that coated, heavy feeling some testers reported.
5. Condition strategically: Follow with a lightweight conditioner only from mid-lengths to ends, keeping it off the crown to preserve lift. For ultra-fine hair, a leave-in spray at the ends can be enough.
6. Style for lift: For maximum volume, we saw the best results when blow-drying with a round brush or at least rough-drying with the head flipped upside down. Air-drying still yielded a touch more body, but the true "volume injection" moment happens with heat styling.

Used this way, the shampoo becomes part of a ritual that respects both the scalp and the cuticle, delivering lift without sacrificing manageability.

The bottle design sits firmly in the professional, backbar world: sleek, slightly faceted, and easy to grip, with a flip-top cap that gives a satisfying click when fully closed. We appreciated being able to see how much product remained—helpful when you’re trying to time a repurchase before a big event.

In the shower, the ergonomics are mostly thoughtful, but not flawless. The cap can be surprisingly stiff to open with wet hands, and some of our testers with reduced hand strength or longer nails found themselves wrestling with it. Others noted that the plastic, while lightweight, can feel a touch flimsy and even crumple slightly as the bottle empties. These are minor annoyances, but at this level of prestige, they’re worth mentioning.

On the plus side, the narrow footprint fits neatly into crowded shower caddies, and the controlled opening helps prevent over-pouring—a crucial detail with such a concentrated formula. We also liked that the bottle aesthetic feels “salon authentic” rather than dressed up for mass retail; it blends seamlessly into a professional-looking lineup of treatments, masks, and styling sprays.

From a practical standpoint, the concentration means the bottle lasts far longer than its size suggests, especially if you’re disciplined about using only a small amount. Several of us found that even with frequent use, it took months to finish, which softens the sting of the initial investment.