Matthew Walker
speaker
842 appearances
2 recordings
2 series
first heard Jun 2025
last heard 26 Jun
Matthew Walker’s voice in public audio — every appearance, attributed to the second.
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recordings per month · last 12 monthsRecordings per month over the last 12 months — 1 in all, peaking in Jun 2026 with 1.
Appearances
Melatonin overall, in terms of its safety profile, is very safe.
It's actually a very good antioxidant.
But you've got to be careful because things like, for example, testosterone supplementation in males, what we know is that if you're injecting testosterone, after a while, after maybe 18 months or so,
that testicles themselves will stop producing their own testosterone.
And even if you stop the administration of the exogenous testosterone, the injection, the testes never return their function of producing testosterone.
Now, we don't have any evidence yet that that's the case, that if you keep taking melatonin at high dose, your body, the fear would be, shuts down its own natural production of melatonin.
I've seen no evidence of that.
In fact, I've seen evidence the contrary, that even after about six months or even 12 months in certain small cities...
When you stop melatonin, the production starts again naturally.
It seems fine.
Problem is, people haven't been taking melatonin for just 12 months.
They've been taking it for years.
We've got no idea what happens after years.
Yeah.
Yeah, that's the worry is that there are no free lunches in biology.
And usually if you fight biology, you typically lose.
Yeah, you've got to be careful because absence of evidence is not evidence of absence.
be very careful when you're doing that deal with your physiology.
So to come back to sort of the three things, the first thing we were mentioning is digital detox.
And don't worry about the blue light.
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