IN SHORT

Our 45 English guides currently cite 379 different scientific sources. Every scientific claim is linked to a numbered source, and the full reference list appears at the end of each guide.

Our mission

There is a lot of skincare information online, but much of it rests on product marketing, personal experience or claims without a clear source. It is often hard to tell what an ingredient actually does and how strong the evidence behind it is.

Our aim is to close that gap: to state plainly what an ingredient, product type or skincare step does, which studies show it, and where the evidence ends. That way you can make more informed decisions about your own skin care.

How we create our guides

Every guide goes through the same steps:

  1. The question people ask. We use search data to find out what people actually look for in each language. Each language’s guide is written from its own research, not translated from another language.
  2. Searching the scientific literature. We search peer-reviewed publications, starting with PubMed. We prioritize systematic reviews, meta-analyses and randomized controlled trials; when we use weaker study types, we say so in the text.
  3. Recording each source. For every study we use, we record the full reference, its main finding and its limitations (number of participants, duration, formulation, study type) in our source pool.
  4. Writing. Every scientific claim is tied to a numbered source and never goes beyond what the study found. Numbers are given exactly as in the source, and important limitations are stated in the text.
  5. Verification. For every guide we prepare a verification table showing which sentence rests on which study and which finding. References and text are checked before publication.
  6. Updates. When a new study or a correction calls for it, we update the guide.

How we rate the evidence

Our guides show the strength of the evidence behind each benefit with three levels:

  • Strong: an independent, high-quality meta-analysis or several large randomized controlled trials with consistent results.
  • Moderate: several controlled studies, but most are small, short or manufacturer-funded.
  • Limited: a single small study, laboratory or animal research, or conflicting results.

When the evidence is limited, we say so clearly. When no study has tested something directly, we say that too.

Our principles

  • Our guides do not name brands or products; we do not recommend products or steer you toward a purchase.
  • We make no treatment promises; we describe what research shows, to the extent it shows it.
  • We give no usage or dosage advice for prescription medicines.
  • On topics such as pregnancy and breastfeeding, we use cautious language and refer you to your doctor.
  • We never present general usage tips without a source as scientific findings.
  • We do not use invented user reviews, quotes or statistics.

Check the sources yourself

Every guide ends with the full list of studies we used. From each reference you can open the PubMed record and the DOI link and read the study’s abstract yourself. The numbers in the text take you straight to the relevant source.

Spotted a mistake?

If you notice an error, a gap or outdated information in a guide, write to us. We review every report together with its source.

info@purefacelab.com

Important

PureFaceLab guides are general information and do not replace diagnosis or treatment. If you have a skin condition, take medication, or are pregnant or breastfeeding, talk to your dermatologist or doctor.