Vitamin C status and nutrient interactions in a healthy elderly population

Area of Science:

• Gerontology
• Nutritional Science
• Human Physiology

Background:

• Maintaining adequate vitamin C (ascorbic acid) status is crucial for elderly health.
• Interactions between vitamin C and other essential nutrients require further investigation in aging populations.

Purpose of the Study:

• To examine vitamin C status in healthy elderly individuals.
• To investigate the relationship between vitamin C and other nutrient levels.
• To explore potential sex differences in these interactions.

Main Methods:

• Cross-sectional study of 677 noninstitutionalized elderly individuals (aged 60-98 years).
• Assessment of plasma ascorbic acid (AA) levels.
• Analysis of vitamin C intake and supplement use.
• Measurement of plasma levels for vitamins B-6, B-12, E, folate, and retinol.

Main Results:

• Marginal vitamin C status was observed in 6% of males and 3% of females.
• Mean plasma AA levels were consistently higher in females compared to males across all intake levels.
• Vitamin C supplementation was associated with elevated levels of vitamins B-6, B-12, E, and folate in both sexes, and retinol in females.
• After controlling for age and dietary intake, plasma AA levels significantly correlated only with plasma vitamin E and folate in females.

Conclusions:

• Vitamin C status is generally adequate in this elderly cohort, with higher levels observed in females.
• While vitamin C supplementation may influence other nutrient levels, its direct correlation with plasma AA is specific to vitamin E and folate in women.
• Further research into nutrient interactions, considering sex-specific factors, is warranted for optimizing elderly nutrition.