Table 4.
Reported Frequency of Consumption of Dietary Vitamin D by Season.
| Food/Vitamin D Content (IU) | Autumn (n = 39) | Winter (n = 32) |
|---|---|---|
| Milk (8 oz), 100 IU | ||
| never, <1/month | 9 | 5 |
| 1–2/month | 2 | 5 |
| 2–4/week | 1 | 10 |
| 5–6/week | 6 | 2 |
| 1/day | 9 | 7 |
| 2–3/day | 4 | 3 |
| Cereal (6–8 oz), 40 IU | ||
| never, <1/month | 11 | 7 |
| 1–3/month | 7 | 12 |
| 1/week | 1 | 4 |
| 2–4/week | 2 | 6 |
| 5–6/week | 1 | 2 |
| 1/day | 1 | 1 |
| Fortified Orange Juice (8 oz), 100 IU | ||
| never, <1/month | 13 | 12 |
| 1–2/month | 7 | 11 |
| 1/week | 5 | 2 |
| 2–4/week | 7 | 3 |
| 5–6/week | 3 | 3 |
| 1/day | 2 | 1 |
| 2–3/day | 1 | 0 |
| Egg (1 whole), 18 IU | ||
| never, <1/month | 4 | 5 |
| 1–3/month | 3 | 2 |
| 1/week | 3 | 3 |
| 2–4/week | 15 | 11 |
| 5–6/week | 6 | 3 |
| 1/day | 3 | 5 |
| 2–3/day | 3 | 3 |
| 6+/day | 1 | 0 |
| Salmon (3.5 oz), 815 IU | ||
| never, <1/month | 10 | 8 |
| 1–3/month | 12 | 13 |
| 1/week | 5 | 6 |
| 2–4/week | 11 | 5 |
| MVI, 400 IU | ||
| never, <1/month | 28 | 26 |
| 1–3/month | 1 | 2 |
| 2–4/week | 2 | 0 |
| 1/week | 0 | 1 |
| 1/day | 5 | 2 |
| 2–3/day | 1 | 1 |
Note: Derived from Halliday et al., 2011 [4].