Human Body Temp Dropped: What's the Real Normal?

The average human body temperature appears to have been higher 150 years ago than it is today, sparking scientific inquiry into the reasons behind this decline. German physician Carl Wunderlich established a benchmark of 37C (98.6F) in the 1860s based on extensive data. However, recent research indicates a downward trend, with current average adult temperatures closer to 97.5F (36.39C).

Studies analyzing datasets from the 19th century to the present reveal this cooling. The drop is observed globally, even in indigenous communities experiencing socioeconomic changes. Experts suggest healthier populations, improved sanitation, and more controlled indoor environments contribute to this biological shift, as the body expends less energy on thermoregulation.

Some theories also question the accuracy of historical measurements, suggesting older thermometers may have been calibrated higher. While the 37C benchmark is being re-evaluated, experts emphasize that slight variations are normal, and focus remains on significant temperature extremes indicating serious health issues.