# Skin Absorption Mechanism — Research Sources

A curated, portable research collection on how substances interact with and cross skin.

## Contents

- `index.html` — browsable source index
- `briefs/` — one HTML research brief per source
- `source-html/` — downloaded source snapshots or transparent provenance pages where hosts blocked automated retrieval
- `SOP.md` — repeatable refresh and publication procedure
- `sources.tsv` — source metadata
- `manifest.tsv` — SHA-256 checksums

The collection separates three claims: skin can absorb some chemicals; damaged skin can be more permeable; and environmental microbial contact can signal to the skin immune system. It does not claim that soil minerals are absorbed through intact skin as nutritional supplements.