Compare like with like — Hair-loss photography is easier to interpret when serial images use consistent views and preparation. A peer-reviewed practical guide developed standardized photography protocols so images can be more reproducible and informative across follow-up.
Know what actually changed — A trustworthy case should identify the real intervention, the timeline and other important changes such as another treatment, supplement, procedure or styling change. A photograph alone cannot establish which factor caused a visible difference.
The image itself can make a claim — FTC guidance treats imagery as part of an advertisement's overall impression. A dramatic before-and-after can imply efficacy even when the text avoids an explicit promise, so the underlying implied claim still needs appropriate support.
Do not hide the limits — A fine-print statement such as results not typical does not automatically correct a misleading impression. Relevant limitations and the context needed to understand a result should be clear and close to the claim or image.