Short answer
Distributors and retailers want to know three things before they stock a skincare product: that it is safe and compliant, that its claims are backed by evidence, and that it has a clear point of difference from the shelf next to it. Evidence helps most when it answers those questions in plain terms, and when the brand can show which piece of evidence does which job.
What buyers want to see
No retailer publishes a single checklist, and requirements differ by chain and category. Industry coverage does point to the same themes again and again:
Substantiated claims. Retailers are asking for documentation behind product claims, not just marketing language. A Formula Botanica podcast describes major US retailers demanding proof behind claims, and Australian Inside Retail coverage says brands that start with evidence make it easier for retailers to communicate benefits confidently and compliantly.
Independent evidence. Vendor material suggests buyers look for independent, human-subject studies with measurable results (Citruslabs). That source sells clinical trials, so treat it as a view from the supplier side.
A clear point of difference. Beauty Independent reports retailer feedback that clean or plant-based positioning alone is no longer enough, and that clinical data, patented formulas or rare ingredients can set a brand apart. Skin Control's founder advises being crystal clear on your point of difference (Inside Retail).
Shoppers who ask for proof. CEW describes a growing "prove it to me" mindset, with clinical skincare a key driver of growth in 2023 sales data from Circana.
Practical fundamentals sit underneath all of this: a compliant product, correct ingredient and safety documentation, and a range and price that fit the retailer. Evidence strengthens a pitch. It does not replace those basics.
Which evidence answers which buyer question
Buyers rarely ask for "evidence" in general. They ask specific questions, and different evidence answers each one.
"Can you say that on the pack?" Claims substantiation: a study designed around the exact claim wording, on the finished product.
"Is it safe and compliant?" Ingredient and safety documentation, and the right regulatory status for the claims you make.
"Does it work, and how do you know?" Independent human data with measurable results, ideally from a study with a comparison group.
"Why does it work?" Mechanism: laboratory data, and molecular evidence from human skin showing which biological pathways the product changes.
"Why should I stock this over what I already have?" Your point of difference, supported by evidence others in the category don't have.
"Can my staff explain it?" Plain-language education material built from the data, not a technical report.
Where molecular evidence helps in a pitch
Molecular evidence works best on the "why does it work" and "why this brand" questions. Skin tape strips taken from participants are analysed by mass spectrometry, which reads thousands of proteins without a preset list of biomarkers. That gives a brand independent, human data on what its product does in the skin, which few competitors can show.
It helps a buyer meeting in three ways:
It gives the brand a specific, credible science story instead of a general "clinically inspired" one.
It gives sales teams and staff training something concrete to explain.
It can feed a publication, which adds independent scrutiny to the story.
It does not do these things:
It does not replace claims substantiation for what goes on the pack.
It does not remove the need for compliance and safety documentation.
It does not guarantee a listing. Buyers also weigh price, range fit, demand and the brand's marketing plan.
How to present evidence in a buyer meeting
Buyers see many decks, so structure matters as much as data.
Lead with the point of difference in one sentence, then show the evidence that backs it.
Show your claims and the study behind each one. Keep claim wording identical to what the study supports.
Add the science story as the second layer. Very few brands can show what their product does at the biological level in real human skin, so even one clear slide of it is instantly convincing.
State the limits. Saying what the data does and does not show builds trust with experienced buyers.
Leave behind a one-page summary that staff can read in two minutes.
Leave out raw data dumps, superlatives you can't back, and any claim that goes beyond the study.