Does Aging Affect Vitamin C Status Relative to Intake? Findings from NHANES 2017-2018
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Does Aging Affect Vitamin C Status Relative to Intake? Findings from NHANES 2017-2018. / Carr, Anitra C.; Lykkesfeldt, Jens.
In: Nutrients, Vol. 15, No. 4, 892, 2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Does Aging Affect Vitamin C Status Relative to Intake? Findings from NHANES 2017-2018
AU - Carr, Anitra C.
AU - Lykkesfeldt, Jens
PY - 2023
Y1 - 2023
N2 - The aging population is growing and fueling a global increase in chronic diseases and healthcare expenditure. In this study, we examine vitamin C dose-concentration relationships based on data from the National Health and Nutrition Examination Survey (NHANES) 2017-2018 to identify a possible age-dependent change in intake vs. concentration relationship among non-supplemented individuals (n = 2828). The vitamin C intake was similar between the younger (18-36 years), middle (37-58 years) and older (59-80+ years) age groups; however, circulating vitamin C concentrations were significantly lower in the middle and older age groups (p < 0.001). For intakes above 75 mg/day, no significant difference in the intake vs. serum concentration relationship was identified between younger and older individuals. However, for intakes below 75 mg/day, we found significantly lower serum concentrations relative to intake for the older compared to younger individuals, despite smoking being more prevalent in the younger compared to older adults (p < 0.001). This effect persisted among non-smokers and was further exacerbated by smoking in older people. Collectively, the present study suggests that healthy aging in non-institutionalized individuals does not increase requirements for vitamin C. In contrast, the lower serum concentrations relative to intake observed in older individuals at intakes < 75 mg/day may suggest that older individuals are more sensitive to a low vitamin C intake, perhaps due to the increased impact of long-term smoking and increased chronic disease prevalence in older adults. This finding may have implications for future intake guidelines in countries with low RDAs and for WHO/FAO, but requires further investigation.
AB - The aging population is growing and fueling a global increase in chronic diseases and healthcare expenditure. In this study, we examine vitamin C dose-concentration relationships based on data from the National Health and Nutrition Examination Survey (NHANES) 2017-2018 to identify a possible age-dependent change in intake vs. concentration relationship among non-supplemented individuals (n = 2828). The vitamin C intake was similar between the younger (18-36 years), middle (37-58 years) and older (59-80+ years) age groups; however, circulating vitamin C concentrations were significantly lower in the middle and older age groups (p < 0.001). For intakes above 75 mg/day, no significant difference in the intake vs. serum concentration relationship was identified between younger and older individuals. However, for intakes below 75 mg/day, we found significantly lower serum concentrations relative to intake for the older compared to younger individuals, despite smoking being more prevalent in the younger compared to older adults (p < 0.001). This effect persisted among non-smokers and was further exacerbated by smoking in older people. Collectively, the present study suggests that healthy aging in non-institutionalized individuals does not increase requirements for vitamin C. In contrast, the lower serum concentrations relative to intake observed in older individuals at intakes < 75 mg/day may suggest that older individuals are more sensitive to a low vitamin C intake, perhaps due to the increased impact of long-term smoking and increased chronic disease prevalence in older adults. This finding may have implications for future intake guidelines in countries with low RDAs and for WHO/FAO, but requires further investigation.
KW - vitamin C
KW - ascorbic acid
KW - vitamin C requirements
KW - vitamin C recommendations
KW - aging
KW - NHANES
KW - ELDERLY WOMEN
KW - PLASMA
KW - DISPOSITION
KW - ASCORBATE
KW - SMOKING
KW - YOUNG
U2 - 10.3390/nu15040892
DO - 10.3390/nu15040892
M3 - Journal article
C2 - 36839250
VL - 15
JO - Nutrients
JF - Nutrients
SN - 2072-6643
IS - 4
M1 - 892
ER -
ID: 340533200