Table 5.
Median plasma concentrations of vitamin B12 and folate per quartile of vitamin intake
| Quartile of vitamin intake | Vitamin intake per day | Vitamin plasma concentrations |
|---|---|---|
| Vitamin B12 (µg) | Vitamin B12 (pmol L−1) | |
| 1 | <3.5 | 260 (212–307)* 3,4 |
| 2 | ≥3.5 and <4.6 | 251 (215–312)* 3,4 |
| 3 | ≥4.6 and <6.3 | 281 (237–333)* 1,2 |
| 4 | ≥6.3 | 290 (235–350)* 1,2 |
| Folate equivalents (µg) | Folate (nmol L−1) | |
| 1 | <239 | 14.7 (10.9–19.5)* 3,4 |
| 2 | ≥239 and <296 | 15.0 (12.5–21.2)* 3,4 |
| 3 | ≥296 and <373 | 17.8 (13.2–24.7)* 1,2 |
| 4 | ≥373 | 19.5 (14.6–25.0)* 1,2 |
Vitamin plasma concentrations are presented as the median (25th to 75th percentile).
*
Significant difference between quartiles of vitamin intake (P < 0.05). The number after the asterisk (*) denotes the quartile from which the given quartile is significantly different.