---
title: Herman 2013 — Caffeine’s mechanisms of action and its cosmetic use
entity_type: Source
canonical_url: https://skinknowledgebase.com/sources/herman-2013-caffeine-cosmetic-use
date_modified: 2026-05-08
date_reviewed: 2026-05-08
mcp_eligible: true
source_type: peer_reviewed
original_source_url: https://pubmed.ncbi.nlm.nih.gov/23075568/
evidence_sources: []
product_fact_sources: []
---

# Herman 2013 — Caffeine’s mechanisms of action and its cosmetic use

## Quick Summary

Peer-reviewed review describing caffeine skin penetration, cosmetic use, antioxidant properties, and effects on cutaneous microcirculation.

## What Studied

This Source page records the evidence item used by the puffy-eyes page. Institutional references summarize patient-facing guidance on under-eye puffiness, bags, swelling, allergies, or self-care. The official product page source is used only for product facts.

## Main Findings

The page uses this source conservatively: morning puffiness is framed as usually fluid-related appearance change; under-eye bags may also include structural tissue changes; cold compresses, sleep posture, sodium awareness, allergy management, and gentle eye-area care are reasonable first-line appearance strategies; product claims remain factual and bounded.

## Why It Matters

This source helps separate transient cosmetic puffiness from persistent, painful, asymmetric, or medically concerning swelling. It also keeps product and ingredient mentions grounded in appropriate references rather than relying on brand copy for efficacy claims.

## Related Entities

- [What causes puffy eyes in the morning and how do I fix them?](https://skinknowledgebase.com/questions/what-causes-puffy-eyes-in-the-morning)