Document Type
Article
Publication Date
10-28-2020
Abstract
Normal human body temperature (BT) has long been considered to be 37.0°C. Yet, BTs have declined over the past two centuries in the United States, coinciding with reductions in infection and increasing life expectancy. The generality of and reasons behind this phenomenon have not yet been well studied. Here, we show that Bolivian forager-farmers (n = 17,958 observations of 5481 adults age 15+ years) inhabiting a pathogen-rich environment exhibited higher BT when first examined in the early 21st century (~37.0°C). BT subsequently declined by ~0.05°C/year over 16 years of socioeconomic and epidemiological change to ~36.5°C by 2018. As predicted, infections and other lifestyle factors explain variation in BT, but these factors do not account for the temporal declines. Changes in physical activity, body composition, antibiotic usage, and thermal environment are potential causes of the temporal decline.
Recommended Citation
M. Gurven, T. S. Kraft, S. Alami, J. C. Adrian, E. C. Linares, D. Cummings, D. E. Rodriguez, P. L. Hooper, A. V. Jaeggi, R. Q. Gutierrez, I. M. Suarez, E. Seabright, H. Kaplan, J. Stieglitz, B. Trumble, Rapidly declining body temperature in a tropical human population. Sci. Adv. 6, eabc6599 (2020). https://doi.org/10.1126/sciadv.abc6599
Peer Reviewed
1
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The authors
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License
Comments
This article was originally published in Science Advances, volume 6, in 2020. https://doi.org/10.1126/sciadv.abc6599