Bone mineral content in medieval Greenland Norse

Abstract

The bone mineral content (BMC) was measured using a special dual-photon scanner in 25 mandibles with normal macroscopic and radiographic bone structure. The mandibles were excavated from two Norse sites in Greenland, which date to the first and last part of the medieval Norse settlement period, respectively. The main purpose of this study was to investigate whether there was a change in BMC levels between the early and the late settlement period. The results showed no difference in male BMC between the early and the late site material. A statistically significant gender difference was found, analogous to most clinical and archaeological BMC studies. The sample did not allow testing for age-related, especially female postmenopausal-related, bone loss. It is known that Eskimos generally have a very low BMC, probably the effect of a high-protein marine diet. The lack of decrease in BMC levels for the Norse could indicate that they did not increase their overall protein intake over the 500-year settlement period. Other studies (both archaeological and anthropological) point to an increased reliance on marine foodstuffs throughout the settlement period. Thus, if the Norse increased their reliance on marine foodstuffs, they probably did not do so to the extent of an almost exclusive marine diet like that of the Eskimo. © 1997 John Wiley & Sons, Ltd.