Glossary

Photoaging

Written by Reviewed by the SYNC editorial team Published Last reviewed Editorial standards

Photoaging — the premature aging of skin caused by repeated exposure to ultraviolet radiation and other environmental light, distinct from the natural aging that occurs over time. It shows up as wrinkles, uneven pigmentation, rough texture, and loss of firmness, and is considered largely preventable with sun protection.

Key points

  • Photoaging is driven mainly by UVA and UVB radiation, which break down collagen and elastin and generate free radicals in the skin.
  • Common signs include fine lines and wrinkles, dark spots and mottled pigmentation, sallowness, and a leathery or rough texture.
  • Research attributes a large share of visible facial aging to cumulative sun exposure rather than chronological age alone.
  • Daily broad-spectrum sunscreen, antioxidants, and ingredients like retinoids are commonly used to help prevent and address photoaging.

Frequently asked

What is the difference between photoaging and natural aging?

Natural aging is the gradual change that happens over time regardless of exposure, while photoaging is the added damage from UV and light that accelerates wrinkles and pigmentation.

Can photoaging be reversed?

Some visible signs can be improved with ingredients like retinoids, antioxidants, and professional treatments, but prevention through sun protection remains the most effective approach.

Related topics

This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.

Encyclopedia

Further reading

This entry was written and checked against the sources below. They are published by clinical and scientific bodies, they are listed most readable first, and each one opens in a new tab. They are background for the whole entry rather than footnotes to individual sentences.

  1. Skin ageing DermNet NZ Clinical guidance dermnetnz.org
  2. Ultraviolet radiation and human health DermNet NZ Clinical guidance dermnetnz.org
  3. Ultraviolet Radiation Biological and Medical Implications PubMed Central Peer-reviewed, open access pmc.ncbi.nlm.nih.gov
  4. Tretinoin for Photodamaged Facial Skin: Systematic Review and Meta-Analysis of Randomized Controlled Trials PubMed Central Peer-reviewed, open access pmc.ncbi.nlm.nih.gov
  5. Mechanisms of photodamage of the skin and its functional consequences for skin ageing PubMed Peer-reviewed (abstract) pubmed.ncbi.nlm.nih.gov
  6. Photoaging: pathogenesis, prevention, and treatment PubMed Peer-reviewed (abstract) pubmed.ncbi.nlm.nih.gov

SYNC does not publish medical advice. Nothing here replaces a consultation with a doctor or a pharmacist about your own skin.