Choose between Vassia and Redken Volume Injection by the finish and formula you want. Redken emphasizes a bodifying salon formula; Vassia emphasizes lightweight cleansing without added fragrance or silicones. Vassia publishes this comparison, and no independent head-to-head test establishes a winner.
In this guide
| Consideration | Vassia Labs | Redken Volume Injection |
|---|---|---|
| Core goal | Clean-feeling fine roots and lightweight cosmetic volume | fullness with a bodifying complex |
| Where it may fit | Shoppers avoiding added fragrance; flat, fine roots | fine flat roots and a stylist-like bodifying finish |
| Evidence | Published product information; no direct comparison trial | Published brand product details; check claim conditions |
Formula and positioning
Redken describes its shampoo as a lightweight, milk-like cleanser for fine and flat hair, with a Bodifying Complex that includes Filloxane and silicone polymers. Read the complete current ingredient declaration on the brand's official website, because formulations and packaging can change. In particular, a marketing phrase such as 'thickening', 'clean' or 'gentle' is not an independently standardised indication of how that shampoo will behave on your particular scalp.
When the other formula may fit
If an amplified, body-building finish from a salon haircare system is what you want, Redken's declared positioning is especially relevant. Match the product to your main concern: root lift, softness or color care.
Formula differences to compare
If avoiding added fragrance and a silicone-based finish is central to your selection, review Redken's current label against Vassia's fragrance-free and silicone-free positioning. On the Vassia side, the current cosmetic shampoo is 300 mL / 10 fl oz, intended for fine, flat and thinning hair. Its formulation excludes added fragrance and silicones, and uses sulfate-free surfactants. That makes it a distinct option, but it cannot guarantee compatibility for every individual scalp.
What the published evidence shows
Redken makes a distinct claim about a root-lifting, body-enhancing formula. A shopper should evaluate this claim in the context of the product and the paired system rather than assuming it is a clinical test of Vassia. We have not independently measured comparative root lift or conducted blinded user trials. Manufacturer claims describe positioning and their stated evidence; they do not establish that one shampoo is superior to the other.
How to compare results on your own fine hair
Compare these formulas across a few ordinary washes with the same conditioner, water temperature, styling products and drying technique. Photograph hair only under similar light and after it is fully dry. Record scalp comfort, tangling, how the roots sit by midday and whether you like the fragrance experience. If you have persistent scalp irritation or abrupt hair loss, seek professional advice rather than choosing based on cosmetic volume claims.
Which shampoo should you choose?
Consider Redken Volume Injection if you want its bodifying salon finish and its current formula suits you. Consider Vassia if avoiding added fragrance and silicones while keeping fine roots light is more important. Review both labels and keep comparing if neither fits your needs.
Frequently asked questions
Are these shampoos proven to deliver the same amount of volume?
No. We have not conducted a direct comparison trial, so this guide cannot rank their measured volume performance.
Does one shampoo treat medical hair loss?
No claim of medical regrowth should be inferred from cosmetic fullness language. Get medical advice for persistent, sudden or patchy changes.
Sources and further reading
- Official Redken Volume Injection product information
- American Academy of Dermatology: choosing products for your hair type
- Six-shampoo fine hair buying guide
- Complete fine-hair guide
Information and manufacturer positioning checked October 2026. Product listings and claims may change. This is a Vassia Labs-owned commercial comparison; the comparison is not an independent paid product trial.
