How can I judge evidence for an aesthetic treatment?

Evidence is more than an appealing result or a scientific-sounding explanation.

Illustrative medical image; does not depict an actual patient, treatment outcome or individual treatment plan.

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What does the claim actually say?

Separate the proposed product, procedure and body area from the advertised claim. Ask for a source that actually supports that claim, and whether its participants and measured results are relevant to your concern. N2 N3

Information type	What it can show	What it cannot establish	Useful check	Decision question
Laboratory research	Possible biological mechanisms	Benefit or safety in patients	Were people studied later?	Is the clinical claim premature? N1
Testimonial or photograph	One reported experience	Cause, usual benefit or risk frequency	Are supporting studies available?	What information is missing? N2
Controlled human study	A defined treatment comparison	Every product or individual outcome	Population, comparator and follow-up	Does this match the proposed treatment? N1 N3

Study labels alone do not establish quality. A useful comparison needs appropriate methods and outcomes; a small or short study may miss uncommon or delayed harms. Differences between groups should also matter to patients, not merely to a measurement. N1 N3

Which options and uncertainties should be compared?

Compare the proposed approach with relevant alternatives and with not having an elective procedure. Ask what improvement is realistically important to you, how it was measured and whether the extra benefit justifies the burdens and risks. N3

One positive report rarely resolves a question. Study size, independent repetition and publication date matter. Newer does not automatically mean better; findings need to be read alongside the wider evidence and changing practice. N4

What should I ask before deciding?

Bring the exact treatment name and the claim you want clarified. Ask who funded the study, which limitations remain, who will perform the procedure and how complications and aftercare would be managed. C2 N3

Does evidence remove treatment risks?

Evidence of benefit does not remove procedural harm. Cosmetic interventions have risks. With injectable fillers, infection, nodules or vascular injury may occur; the material and use matter. A favorable average result does not cancel these possibilities. C1 F1

What should follow-up assess?

Agree what will be reviewed: the original concern, meaningful change, adverse effects and whether further treatment remains reasonable. Follow-up duration matters when interpreting research and your own experience; one early photograph cannot establish lasting benefit. N3 C2

Which questions help assess the evidence?

Does one positive study settle the question?

No. Independent studies that produce consistent findings are more informative than one report. Check the sample size and methods, and whether later research supports or changes the initial conclusion. N4

Can photographs prove a treatment works?

Not alone. Lighting, angle, timing and selection can affect a comparison. These are practical questions to ask; even carefully comparable photographs do not replace controlled evidence about typical benefits and harms. N2

Does FDA approval cover every use?

No. FDA authorization concerns particular products and uses in the United States. It does not establish every application, guarantee an outcome or determine authorization in Türkiye. Ask which exact product and intended use are meant. F1

Is a systematic review always conclusive?

No. A systematic review brings studies together, but its usefulness depends on their quality, comparability and completeness. Combining limited studies does not turn uncertainty into a guaranteed result for you. N1

What if I still cannot judge the evidence?

Ask the clinician to explain the strongest relevant evidence and its gaps in plain language. You can take time, seek another assessment or defer the procedure rather than decide from an unexplained claim. N3 C2