Riboflavin status in 270 free-living and healthy elderly was determined from dietary intake (3-day food records) and erythrocyte glutathione reductase activity coefficients (EGR-AC). High EGR-ACs (>1.35) indicate poor riboflavin nutriture. Mean dietary intakes of riboflavin were 1.86 ± 0.64 (SD) for males and 1.58 ± 0.69 mg/day for females. Approximately 45% of the population were taking some supplemental riboflavin and total riboflavin intakes ranged from 0.65 to 165 mg/day. The mean EGR-AC for those taking supplemental riboflavin was significantly lower than that of the nonsupplemented group (1.06 and 1.16, respectively). Only three subjects had EGR-ACs > 1.35. A significant correlation was found between total riboflavin intake and EGR-AC (r = -0.53). In a separate population of 667 volunteers between the age of 20 and 87 yr, a significant decrease in mean EGR-AC with age was found. The mean EGR-AC for those over 60 yr and not taking a supplement was 1.16 ± 0.10 compared to 1.23 ± 0.11 for those from 20 to 29 yr old. Inadequate riboflavin nutriture appears to be more of a problem for younger than older adults.
|Original language||English (US)|
|Number of pages||8|
|Journal||American Journal of Clinical Nutrition|
|State||Published - Dec 1 1982|
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Nutrition and Dietetics