Table 1.
Composition of micronutrient supplement compared to Reference Nutrient Intake (RNI) for British adults (men or women, whichever is the higher) [21]
| Micronutrient | Daily dose | Daily dose in 2008 study | RNI | Multiples of RNI in current study |
|---|---|---|---|---|
| Vitamin A |
|
|
|
|
| Retinyl palmitate (mg) |
1.6 (4840 i.u.) |
- |
0.7 |
2.3 |
| Betacarotene (mg) |
6.0 |
4.8 |
4.2 |
1.4 |
| Vitamin D (μg) |
20 |
5 |
10a |
2 |
| Vitamin E (mg) |
80 |
10 |
4 |
20 |
| Vitamin K (μg) |
140 |
- |
1/kg/d |
2 |
| Vitamin C (mg) |
300 |
70 |
40 |
7.5 |
| B vitamins |
|
|
|
|
| Thiamin (B1) (mg) |
36 |
1.4 |
0.9 |
40 |
| Riboflavin (B2) (mg) |
12 |
1.4 |
1.3 |
9.2 |
| Pyridoxine (B6) (mg) |
20 |
1.9 |
1.4 |
14.2 |
| Niacin (B3) (mg) |
54 |
18 |
16 |
3.4 |
| Folic acid (B9) (mg) |
1 |
0.4 |
0.2 |
5 |
| Cobalamin (B12) (μg) |
28 |
- |
1.5 |
18.7 |
| Pantothenic acid (B5) (mg) |
40 |
- |
5b |
8 |
| Minerals |
|
|
|
|
| Iron (mg) |
16 |
30 |
14.8 |
1.08 |
| Zinc (mg) |
30 |
15 |
9.5 |
3.2 |
| Copper (mg) |
1 |
2 |
1.2 |
0.83 |
| Selenium (μg) |
350 |
65 |
75 |
4.7 |
| Iodine (μg) |
400 |
150 |
140 |
2.9 |
| Chromium (μg) |
200 |
- |
25b |
8 |
| Magnesium (μg)c |
100 |
- |
250 |
0.4 |
| Manganese (mg) |
8 |
- |
1.4b |
5.7 |
| L-Cystine (mg) |
80 |
- |
- |
- |
| L-Carnitine (mg) |
60 |
- |
- |
- |
| Citrus bioflavonoids (mg) | 60 | - | - | - |
aBased on RNI for older adults; no intake of pre-formed vitamin D is required for adults exposed to sun. bNot a formal RNI but probably an adequate intake. cFull dose RNI of Magnesium cannot be administered in this form as it may predispose to diarrhea.