The core biology is solid and decades old. Mainstream medicine mostly ignored it until consumer devices and one rich biohacker made it trendy. Real benefits exist for hair, wounds, and inflammation, but the commercial hype still runs ahead of the strongest evidence.
https://www.nature.com/articles/d41586-026-00878-1
https://pubmed.ncbi.nlm.nih.gov/20681024/
A Russian biophysicist spent 30 years proving that shining red light on a cell could double its energy, and almost nobody believed her until a tech billionaire named Bryan Johnson made her work the most searched biohack on the internet.
Her name was Tiina Karu.
She worked in a… pic.twitter.com/ZySG4eEQm3
— Millie Marconi (@MillieMarconnni) August 24, 2026
Nature published a long feature on red-light therapy in March 2026, moving it from fringe to respectable science.
New 12-month data shows sustained hair-density gains from home LLLT devices.
Consumer red-light masks, caps, and panels keep exploding in sales after Johnson’s public protocol.
More clinical work continues on inflammation, blood sugar, and recovery effects.