Lead retention in ancient Nubian and contemporary populations.

The lead concentration in bone and tooth has been determined in 105 well-preserved Nubian skeletons from the period 3300 B.C. - 750 A.D., as well as in 17 individuals from present-day Denmark. The analyses were performed blind in two different laboratories, and the results were in close agreement. Compared to contemporary lead levels in Denmark, the oldest Nubian bones contained about 10 times less lead, while the teeth contained about 30 times less lead. Small increases in lead retention of Nubians during historical time periods were associated with early uses of lead.