After spending a few days at high altitude, the number of red blood cells increases significantly. This number can even double under conditions of high altitude. hypoxia (reduced oxygen availability). The body compensates for this lack by increasing the number of red blood cells, which transport oxygen to the tissues. This adaptive phenomenon is well known.
By Thaïs de Bastard THE Subscribers
In low-oxygen conditions, red blood cells act as "glucose sinks," which would explain why people living at high altitudes have much lower rates of diabetes. Here's why.

An American study has shown that at high altitude, red blood cells change their metabolism and decrease blood glucose levels, which allows oxygen to be transported more efficiently to the tissues.
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