- Ancient humans ate significant quantities of fiber, but as our diet changed our gut didn't keep up.
- The findings come from analysis of ancient poop dating from A.D. 1125 and earlier.
- The amount of fiber our diet contained in ancient times was up to sixteen times what we eat now.
The ancient Native Americans of the desert Southwest subsisted on a fiber-filled diet of prickly pear, yucca and flour ground from plant seeds, finds a new analysis of fossilized feces that may explain why modern Native Americans are so susceptible to Type II diabetes.
Thousands of years of incredibly fibrous foods, 20 to 30 times more fibrous than today's typical diet, with low impact on the blood sugar likely left this group vulnerable to the illness when richer Anglo foods made their way to North America, said study researcher Karl Reinhard, a professor of forensic sciences at the University of Nebraska-Lincoln.
"When we look at Native American dietary change within the 20th century, the more ancient traditions disappeared." Reinhard told LiveScience. "They were introduced to a whole new spectrum of foods like fry-bread, which has got a super-high glycemic index."