Abstract
The purpose of this study was to determine niacin status of Korean adults. Three consecutive 24‐hour recalls and urine samples were collected from 149 healthy adults (70 males and 79 females), aged 20‐65y, living in Seoul metropolitan area, Republic of Korea. The mean dietary niacin intakes (mean/SD) were 17.65/4.70 mg/day and 9.24/2.13 mg/1000 kcal. Total niacin intake (dietary plus supplemental) was 21.51/11.38 mg/day. The dietary intake of men was significantly higher than that of women, but no significant difference in total intake was determined by gender. Only 5% of subjects consumed total niacin less than the Estimated Average Requirements for Koreans. Average urine niacin (N1‐methylnicotinamide) excretion was 1.45/1.16 μg/g creatinine. Urinary niacin of women was significantly higher than that of men (p<0.01). There were no significant correlations between intakes and urinary excretion of niacin. Only 13% of subjects were niacin deficient (urine niacin <0.5 μg/g creatinine), but urinary niacin excretions of almost half of subjects were 0.5‐<1.59 μg/g creatinine, which is representative of low niacin status. Therefore, although niacin intake is adequate compared to the Dietary Reference Intakes for Koreans, niacin status may not be inadequate in Korean adults. Supported by 2014 research fund of National Research Foundation of Korea (NRF‐2011‐0021273).
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