Hello and welcome. You are listening to Sigma Nutrition Radio. I'm your host, Danny Lennon.

This is episode 377 of the podcast, and you're in for an absolute treat today off the back of last week's episode with Dr. Kevin Hall, which many of you had very kind things to say and really, really enjoyed.

So that was great to hear.

We have another renowned and high-level

researcher to discuss. And yet again, this is a return guest to the podcast. Today I'm going

to be talking with Dr. Herman Ponser, who was on the show a number of years ago when we discussed

one of the principal areas of his research that has really caught the eye of many people

involved in the area of human metabolism, and that relates to the constrained energy expenditure

model or hypothesis. And we discussed some of that work, and we will be referencing some of that

again, but also opening out into a wider discussion about what

exactly metabolism is, why it's so misunderstood so commonly, and some of the really interesting

aspects related to metabolism and mitochondria and how that feeds into energy expenditure

more broadly and things like metabolic rate and how that may tie to longevity and maybe some

evolutionary biology explanations for this and then comparisons between humans and other mammals.

And so this has all been work that Dr. Ponzer has done for many years now in human energetics

and evolution. And his background is in evolutionary anthropology.

And he's currently an associate professor

of evolutionary anthropology at Duke University.

And his work in that field has covered a host of areas.

But notably, he had a number of groundbreaking studies related to hunter-gatherer populations,

where he has most notably studied the Hadza, who are hunter-gatherers based in northern Tanzania.

And he's also looked at that in comparison to metabolic measurements in other mammals.

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