Dr. Glen Jeffery

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1,102 appearances 1 recordings 1 series first heard Dec 2025 last heard 1 Dec

Dr. Glen Jeffery’s voice in public audio — every appearance, attributed to the second.

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Huberman Lab · Using Red Light to Improve Metabolism & the Harmful Effects of LEDs | Dr. Glen Jeffery · 1 Dec 2025 podcast

So first of all, the way you've described it is absolutely the way I think about it.

And I think all our colleagues, it's balance.

It's balance.

You should be very careful about what you read on an LED box because people are saying sun-like.

Now, I've never found commercially an LED that says that that's really gone anything significantly beyond 700.

So, it doesn't matter what they're telling you, I'm exceedingly doubtful that commercially anyone has got anything that does that.

Because the only way you could do that is to have a vast array of LEDs in a single device

So I have an LED at 670, an LED at 700, an LED all the way up to over 1,000.

It's not realistic because it's expensive and it draws lots of energy.

And the other thing is that we now have found that the mitochondria knows that it's a compressed load of LEDs because if you put people under a compressed series of LEDs like that...

you don't get the same response or the same positive effect as you do if you put them under an incandescent light where the spectrum is totally smooth.

There's no ups and downs at the top of them.

It's totally smooth.

Now, how a mitochondria does that is completely and utterly beyond me.

No.

And isn't it amazing that mitochondria can sort that one out?

And it just makes me feel, by the time it's all over for me, I'll have got one bite at this apple, but there's a load more there that I think we're going to find out.

They're doing things that are just inconceivable at the moment.

So I think we're going to leave candlelight out of it because to get enough light out of a candle, we're going to have to have copious amounts of candles.

Yeah, yeah.

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