Photoaging is a Bioenergetic Problem: How Wrinkles via Sunlight Are Mitochondrial Damage Made Visible

The Energy Code · Apr 7, 2026 · 22m

This Deep Dive breaks photoaging out of the “cosmetic” category and reframes it as a systems-level loss of cellular resilience driven by ultraviolet exposure and mitochondrial stress. UVA and UVB create different injury patterns — UVB skewing toward more direct DNA damage in the epidermis, UVA driving deeper dermal oxidative stress that impacts fibroblasts and collagen architecture. The paper’s central thesis is bidirectional: UV damages mitochondria, and damaged mitochondria amplify UV injury through ROS, which creates a self-reinforcing loop that accelerates senescence, apoptosis, and…