Stop Using Your Red Light Until You Listen to This with Researcher Dr. Glen Jeffery

The Alli Worthington Show

Alli Worthington

Education, Self-improvement, Society & Culture, Health & Fitness

4.9 • 646 Ratings

🗓️ 27 April 2026

⏱️ 38 minutes

🔗️ Recording | iTunes | RSS

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Summary

Join the Uplift Community App TODAY! If you have ever had that quiet nudge that something in your home environment might be working against your health, you are not imagining it. And surprisingly, the culprit might be your lightbulbs. 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. What You Will Learn Why LED lights are missing the wavelengths your body needs for healthy metabolism What NASA discovered when healthy astronauts started showing pre-diabetic markers The truth about red light therapy panels and why more is not better Why sitting by a window is not the same as going outside What the research really says about red light and collagen Why timing matters and why red light works best before disease takes hold The simple, inexpensive bulb swap that can start rebalancing your light environment today 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: Uplift App Wise Woman Era I hope you loved this episode! 🎉If you haven’t already, make sure you tap that subscribe button on Apple Podcasts or Spotify so you never miss an episode. And yes—we’re on YouTube now too! If the show has been a bright spot for you, leaving a review or a few stars is such a gift. It truly means the world to me. Take good care of yourself, and keep showing up with joy. Share this episode with a friend who might enjoy it too! xo, Alli

Transcript

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0:00.0	We've got all these really attracted ladies and they're using these red light masks.
0:04.5	I should say there's no evidence for this.
0:06.4	They're using all these red light masks to retain their looks.
0:10.7	And then maybe five years' time, they're going to start aging really quickly.
0:14.0	I just don't know.
0:15.0	It's a bit like going back to perhaps to smoking in the 1950s, right?
0:21.4	We didn't really know what the consequences were.
0:25.9	That was revealed more later.
0:28.0	But there were many people saying,
0:29.8	let's just avoid this if we can,
0:32.1	because the probability is the outcome is not going to be good.
0:42.7	Okay. is the outcome is not going to be good. I'm so glad you're here today because I think this is the most important episode I've ever done
0:47.5	in the 500-ish episodes I've done. I've been doing this show for eight years now. This is the best show I've ever done.
0:57.6	So we've uncovered some amazing things we're going to talk to you about. Today we're talking about
1:04.4	red light and near infrared light. This is all over the internet. I have a panel. I use it all
1:10.2	the time. Everyone is saying you should use it this way. I have a panel. I use it all the time. Everyone is saying, you should use it
1:14.2	this way. You should use it that way. You should buy this. You should buy that. Use my affiliate code.
1:18.9	Use this. Use this. I have no commercial interest with anything. Neither does the guest I'm bringing on.
1:24.7	I heard this guest on one of the top health podcast in the world on
1:29.5	Huberman podcast, and it became my mission to get him on the show. This is Professor Glenn Jeffrey.
1:35.6	He did his doctorate in neuroscience at Oxford. He completed postdoctoral work at the University of
1:41.5	Chicago and Oxford again, and he is on the faculty at the
	...

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