A recent analysis of temperature trends suggests that the average human body temperature has dropped since the 19th century due to physiological changes. The authors of the new study also highlight potential causes of these alterations.

Most of us only take our temperatures when we are worried that we have a fever, as a result of an infection or a cold, for example.

But body temperature can indicate and be influenced by many other factors; lifestyle habits, age, and ambient temperature can all influence how our body disperses heat.

Body temperature is also a marker of metabolic health. Specifically, the authors of the new study explain, human body temperature indicates metabolic rate, which some have linked with longevity and body size.

So what is our normal body temperature? In 1851, a German physician called Carl Reinhold August Wunderlich surveyed 25,000 people in one city and established that 37°C is the standard temperature of the human body.

However, recent analyses and surveys suggest that the average body temperature is now lower.

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