Table 3.
Dietary nutrient intake variables of healthy Brazilian participants according to the lowest and highest quartiles of unmetabolized folic acid (UMFA) concentrations, São Paulo, Brazil
| Variablesa | Quartiles of UMFA | pb | |
|---|---|---|---|
|
| |||
| 1 (Lowest) (N = 35) | 4 (Highest) (N = 37) | ||
| UMFA concentrations (nmol/L) | 0.34 (0.28 – 0.36) | 0.89 (0.74 – 1.09) | - |
| Total folate (μg DFEs/d)c | 383 (327 – 431) | 408 (377 – 469) | 0.015 |
| Natural food folate (μg/d) | 211 (184 – 225) | 201 (182 – 228) | 0.642 |
| Folic acid (μg/d) | 95 (76 – 125) | 136 (104 – 148) | 0.001 |
| Vitamin B2 (mg/d) | 1.6 (1.3 – 1.7) | 1.6 (1.4 – 1.6) | 0.892 |
| Vitamin B6 (mg/d) | 1.7 (1.6 – 1.8) | 1.6 (1.5 – 1.7) | 0.035 |
| Vitamin B12 (μg/d) | 4.2 (3.6 – 5.2) | 3.5 (2.7 – 4.6) | 0.088 |
| Methionine (g/d) | 2.0 (1.7 – 2.4) | 1.9 (1.6 – 2.0) | 0.037 |
| Choline (mg/d) | 348 (306 – 388) | 310 (283 – 329) | 0.009 |
| Betaine (mg/d) | 124 (99 – 164) | 125 (107 – 148) | 0.883 |
a
Described as median and interquartile range. All variables were compared using the Mann-Whitney U test.
b
Significant p values shown in bold font.
c
Presented as dietary folate equivalents (DFEs). 1 μg of DFEs = 1 μg of natural folate sources = 0.6 μg of folic acid from fortified foods.