Red Light Therapy Safety: What Marketers Won’t Tell You

Most red light therapy videos only talk about the benefits. Almost no one talks about when it can make things worse.

In this episode of the Regeneration Effect Podcast, Dr. Yi Song sits down with Lee Weinstein, the original inventor of laser tag and a lifelong science innovator, to break down the real science behind red light therapy.

They explain the difference between lasers and LEDs, why “laser” is often a marketing term, and what actually matters biologically once light enters the body. You’ll hear the historical origins of photobiomodulation, including Florence Nightingale’s battlefield observations and early red light experiments.

Most importantly, this conversation addresses something rarely discussed: red light therapy can energize biological processes. That can be beneficial for healing and mitochondrial function. But in certain situations, such as active infections or growing cancers, increasing cellular energy may not be helpful.