Every conclusion starts with a good question.
A reference is useful when it is clear what it supports. Here is how we read and use our sources.
Different sources, different purposes
A terminology reference defines concepts. A clinical study investigates a specific outcome. A review brings together several studies. A regulatory document describes a particular medicine or safety concern. Registering a study does not, by itself, validate its results.
IUPAC Gold Book — Peptides
Terminology
EMA — Wegovy: European public assessment report
Regulatory documentation
FDA — Safety risks of substances used in compounding
Safety
WADA — current Prohibited List
Anti-doping rules
Effects of Collagen Supplements on Skin Aging — systematic review, 2025
Systematic review
Acetyl Hexapeptide-8 in Cosmeceuticals — review, 2025
Research review
Usage of Synthetic Peptides in Cosmetics for Sensitive Skin, 2021
Ingredient review
ClinicalTrials.gov — clinical trial registry
Trial registry
Limitations matter more than promises
When reading, check the participant group, controls, endpoints, funding and limitations. A cell experiment is not equivalent to a treatment outcome. Findings about a specific cosmetic formula do not automatically apply to every product with a similar ingredient.
Accuracy and updates
Every article has a date and a source list. We do not use invented testimonials, expert credentials or effectiveness percentages. Regulatory documents can change; check the current prescribing information separately with a professional.