A recent medical study concluded that the natural temperature of the human body is no longer 37 degrees Celsius, but has decreased over the past century and a half to about 36.3 degrees Celsius, which may necessitate a review of many medical calculations.

About 150 years ago, a German doctor analyzed a million measurements of temperature for about 25,000 patients, and concluded that the human body's normal temperature was 37 degrees Celsius.

The matter was treated as a standard, and it was published in a large number of medical periodicals, and helped generations to know the severity of the diseases that afflict them or their relatives.

But more than 20 recent studies all concluded that this number (37) is very high. The results of these studies led to the belief that the analyzes published in 1869 were inaccurate.

However, a recent study by researchers from Stanford University in America, found that the figure reached 150 years ago "was correct at the time", but it is no longer accurate, given the changes that occurred in the human body.

"I don't think they were wrong; I think it was the temperature that went down," says Julie Parsonette, Professor at Stanford University School of Medicine and lead study.

According to the researchers, the normal human body temperature is now 36.3 degrees Celsius.

The research team at Stanford Medical School analyzed data belonging to more than 189 thousand people, in which more than 677 thousand measurements in three different stages were monitored between 1862 and 2017, in an attempt to reveal the change in the temperature of the human body during that period.

The researchers found that the records reflected a continuous decrease in temperature, the more recent the studies examined.

Professor Parsonet says, "Two things that surprised me (...) the amount of change and temperature continued to decrease at the same rate."

The research team found that every decade the human body temperature decreases by about 0.03 ° C for men and 0.029 ° C for women.

According to the study supervisor, several factors have to do with the average human height, weight, and surrounding conditions, in addition to diseases that were previously difficult to treat and have become simple today, all of which affected the decrease in its temperature.