Before-and-after photos are useful only when lighting, angle, part, wetness and styling are comparable. Look for details about every product used and what was measured. Cosmetic fullness from cleansing or drying is different from evidence of new hair growth.
In this guide
Same light, same angle, same hair part
Overhead lighting can make the scalp more visible, while soft frontal light may conceal it. A centre part compared with a side part can make hair appear dramatically different. Images should be taken from comparable positions and distances.
Check whether both images show dry hair
Wet hair naturally clumps and often makes scalp show through more. Comparing damp hair to dry, freshly styled hair is not a fair demonstration of shampoo performance. Hair that is blow-dried with root lift may look much fuller than air-dried hair regardless of cleanser.
Separate product systems from one shampoo
A brand may use mousse, dry shampoo, finishing spray, extensions or a thickening conditioner alongside the shampoo in promotional images. If the benefit is presented as shampoo-only, the test must actually isolate shampoo performance. Look for methodology and what the measured endpoint represents.
What would count as stronger evidence
Controlled testing, clearly described methods, appropriately measured outcomes and reproducible results provide stronger support than a single dramatic picture. Brand-owned tests can be informative but are not automatically equivalent to independent comparisons.
Applying this standard to Vassia
Vassia Labs positions its shampoo for cosmetic root volume and a lightweight finish. It should not use mismatched angles or imply hair regrowth in before-and-after pictures. Apply the same photo-comparison standards to Vassia as to any other shampoo.
Frequently asked questions
Can hair appear fuller without any new growth?
Yes. Cleansing, drying and styling can change the apparent volume of existing hair.
Do photos prove a treatment works?
Not by themselves. Controlled methods and transparent comparisons are important.
Continue reading
- Hair Density vs Thickness vs Volume: What Shampoo Can Actually Change
- Best Shampoo for Fine, Thin Hair: 6 Options Compared
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