Midlife Metabolism: Fact vs. Fiction

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The Psychology of Health

Milan Toma

7 episodes

6 days ago

Each episode is a clear, accessible synthesis of research studies on timely and controversial health topics; no hot takes, no hype, just what actual science says. Hosted by Milan Toma, Ph.D., this podcast cuts through the noise. Instead of speculation and hearsay, you’ll get evidence-based insights on everything from sleep and weight gain to the anatomy of misinformation and the psychology behind public health debates. If you’re frustrated by the flood of opinions online and want to know what the research really shows, this is the show for you.

Medicine

Health & Fitness

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Medicine

Health & Fitness

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Midlife Metabolism: Fact vs. Fiction

The Psychology of Health

15 minutes 31 seconds

1 week ago

Midlife Metabolism: Fact vs. Fiction

This episode fundamentally challenges the popular belief that human metabolism slows down during midlife, asserting instead that total energy expenditure remains stable between the ages of 20 and 60, only declining after age 60. Using gold-standard measurements, the text explains that the weight gain many adults experience is not due to a slowing metabolism but rather to changes in body composition, specifically the loss of lean muscle mass and the accumulation of fat. Furthermore, this episode highlights that aging and metabolic decline occur nonlinearly, with major molecular and functional transitions occurring around ages 44 and 60, which correspond to accelerated risks for age-related diseases. Consequently, this episode suggests that effective weight management strategies must focus on preserving muscle mass, promoting physical activity, and timing interventions to align with these critical metabolic inflection points.

Based on:

Herman Pontzer, Yosuke Yamada, Hiroyuki Sagayama, Philip N. Ainslie, Lene F. Andersen, Liam J. Anderson, Lenore Arab, Issaad Baddou, Kweku Bedu-Addo, Ellen E. Blaak, Stephane Blanc, Alberto G. Bonomi, Carlijn V.C. Bouten, Pascal Bovet, Maciej S. Buchowski, Nancy F. Butte, Stefan G. Camps, Graeme L. Close, Jamie A. Cooper, Richard Cooper, et al. Daily energy expenditure through the human life course. Science, 373(6556):808–812, 2021. doi:10.1126/science. abe5017.

Allyson K. Palmer and Michael D. Jensen. Metabolic changes in aging humans: current evidence and therapeutic strategies. The Journal of Clinical Investigation, 132(16):e158451, 2022. doi:10.1172/JCI158451.

Xiaotao Shen, Chuchu Wang, Xin Zhou, Wenyu Zhou, Daniel Hornburg, Si Wu, and Michael P. Snyder. Nonlinear dynamics of multi-omics profiles during human aging. Nature Aging, 4:1619–1634, 2024. doi:10.1038/s43587-024-00692-2.