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Dr. Glen Jeffery, a leading light researcher at University College London, is uncovering what our modern light environment is doing to our metabolism, aging, blood sugar, and even our vision. His findings are the kind that make you want to walk through your house and rethink every bulb. The science is new, the implications are big, and the solution is far simpler than you would expect.

This conversation is practical, eye-opening, and honestly a little shocking. If you use red light therapy, LED bulbs, or spend most of your day indoors, this is the episode you need.

Timestamps

(0:00) – Introduction: why light is either helping or harming us every day

(2:12) – What's missing from LED light that your body actually needs (The "Red Gap")

(4:23) – How LEDs disrupt metabolism, blood sugar, and accelerate aging

(7:13) – Why this story is so fresh and who's most vulnerable 

(9:23) – Do windows protect you? The surprising answer about infrared-blocking film

(10:56) – Why going outside beats sitting by a window every single time

(12:17) – How to use a red light panel correctly (avoiding the "overdose" effect)

(17:22) – Alli's red light routine: identifying if she is over-exposing herself

(20:43) – Red light masks, open eyes, and what Dr. Jeffery is actually worried about

(24:27) – The red light and collagen myth debunked: Why it's about energy, not just aesthetics

(25:29) – Why red light therapy works best before disease takes hold

(28:12) – Blue light from devices: less scary than we thought, but still worth managing

(31:48) – The halogen bulb swap: practical, affordable, and backed by real experiments

WATCH ALLI  ON YOUTUBE

Links to great things we discussed: 

Take good care of yourself, and keep showing up with joy. Share this episode with a friend who might enjoy it too!

xo,

Alli