Serum Total Homocysteine Concentrations in the Third National Health and Nutrition Examination Survey (1991–1994): Population Reference Ranges and Contribution of Vitamin Status to High Serum Concentrations

Abstract

Upper reference limits for the serum total homocysteine concentration increased with age and were higher for male participants than for female participants at all ages. In most cases, high homocysteine concentrations were associated with low serum vitamin concentrations.