The Molecular Atlas / Skincare literacy

By Dissolv Labs · Published October 13, 2026 · Selected sources checked October 13, 2026

One word can describe very different products

“Peptide” on a product title does not tell you which sequence is present, its concentration or how the formula was evaluated. Start with the complete ingredient list and the product's intended use. A cosmetic formula should be assessed as a formula; a research vial should be assessed as a research material.

What an ingredient list can tell you

FDA explains that retail cosmetic ingredients generally appear in descending order of predominance. There are exceptions: ingredients at 1% or less can be listed in any order after those above 1%, and color additives have additional rules. That means position in a list is not a precise concentration calculator. Read FDA's ingredient-labeling guide.

Record the actual ingredient names rather than assuming a headline supplies the whole formula. If an exact concentration is not stated, do not invent one from placement alone. Also distinguish a product's net weight from the amount of a particular ingredient.

Ingredient evidence and product evidence are different

Imagine two hypothetical serums containing the same named peptide. They could differ in the rest of the formula, ingredient amounts, packaging and the conditions under which they were tested. A paper on the isolated ingredient cannot answer all of those product-level questions.

For a finished-product claim, look for a description of the actual formula tested, participants, comparator, duration and measurement. Ask whether the outcome was an instrument reading, a clinician assessment or a participant questionnaire. Each can be informative, but they should be described accurately.

Before-and-after images also need context: lighting, camera settings, timing and any concurrent products can affect interpretation. A persuasive photograph is not a substitute for the methods needed to understand the comparison.

Why wording matters

FDA distinguishes cosmetic claims from claims to treat disease or affect the structure or function of the body, which can bring a product under drug requirements. Cosmetic labeling must also be truthful and not misleading. This is why a cosmetic explanation should describe the supported appearance-related outcome precisely rather than borrowing disease-treatment language from an unrelated paper. Read FDA's explanation of cosmetic claims.

Use this five-question formula check

1. What is the complete ingredient list?
2. Which exact finished formula was evaluated?
3. What outcome was measured, and how?
4. Was there a meaningful comparison over an appropriate period?
5. Does the product statement stay within what the evidence supports?

The linked balm and ampoule are catalog examples for practicing this reading method. This guide does not claim that those finished formulas were tested in the ingredient studies discussed elsewhere in the Atlas. Consult each product's current label for its intended use and directions.

For a molecular comparison, continue to the AHK-Cu versus GHK-Cu guide. For a formulation comparison, keep the complete product at the center of the question. Research-use materials should not be substituted into home skincare recipes.

Keep exploring

• AHK-Cu vs GHK-Cu: One Letter, Different Research
• Try the interactive peptide lessons

Sources and scope

1. FDA cosmetic ingredient-labeling guide
2. FDA cosmetic claims guidance

Educational synthesis of selected sources, prepared with AI assistance. This is not a systematic review or independent medical review. Product links are to Dissolv Labs’ own catalog. For corrections, contact Dissolv Labs and include the source and passage.