No Incan Dinner Parties During the Summer (ca. 1500 AD)
An anthropology professor from Trent University recently put together a study on the diets of the Inca who lived in ancient Peruvian town. By studying the remains of 500-year-old Incan mummies, she was able to reconstruct what kinds of foods they ate, how much they consumed, and when the food was eaten.
A number of Incan mummies were uncovered at the coastal town of Tupac Amaru, in the midst of an ancient cemetery. Since this area of Peru is extremely dry throughout the entire year, the preservation conditions for organic materials is very good – many of the ancient mummies are so well preserved that parts such as skin, hair, eyelashes, and fingernails remain on the bodies. In some cases, tattoos have even survived the decomposition process and are still visible.
Tissue samples taken from the mummies – including pieces of hair, nail, skin, bone, muscle and tendon – were tested in order to obtain the chemical signatures that are left behind when human beings consume foods. Typically, a piece of bone will record the diet of an individual over the past fifteen years, due to its extremely slow growth rate. Also, since hair averages a growth rate of one centimeter per month, it can record an individual’s dietary habits during the weeks before death.
The study revealed that the Inca had rather extreme seasonal fluctuations in their diet: in the winter, the Inca ate mostly tubers, which includes items like potatoes, while in the summer their primary subsistence was on corn. For the mummies from this area of Peru, that was quite an odd find – historians have known that the Inca normally had an excellent ability to maintain a healthy stash of food stores and supply the food to their surrounding populations, but it appeared that the people here were relying heavily on cultivated foods in their diet.
That means that the Inca from this region were in a rather precarious position – for some reason or another, they weren’t getting access to stored food in any significant quantities from the centralized distribution of the Incan capital cities, and thus these people had no fallback plan for surviving crop failures. Also, the evidence gleaned from the mummies showed that most of the people died during the summer, which was contrary to typical thinking. Normally, ancient populations lost more people during the winter’s harsh conditions than in the summer – but for this group of Inca, the summer’s lack of dietary choices caused malnutrition and a susceptibility to disease.
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