Define Fat requirements in human body?
There is no change in fat digestibility at altitude of <4500 m. However, at extreme altitude, there are reports that fat absorption gets impaired. Intake of fat decreases due to anorexia. D-xylose excretion, which is used as test of the absorptive activity of upper part of small intestine, also remains normal, indicating that absorptive functions of the small intestine are not disturbed at high altitude up to 5000 m.