TABLE 1.

Composition of the micronutrient tablet¹

Micronutrient	Amount	RNI
β -Carotene	4.8 mg	4.2 mg equivalent
Ascorbic acid (vitamin C)	70 mg	40 mg
Cholecalciferol (vitamin D3)	5 μg	—
Tocopherol (vitamin E)	10 mg	4 mg (uncertain)
Thiamine (vitamin B-1)	1.4 mg	1.0 mg
Riboflavin (vitamin B-2)	1.4 mg	1.3 mg
Niacin	18 mg	17 mg
Vitamin B-6	1.9 mg	1.4 mg
Cyanocobalamin (vitamin B-12)	2.6 μg	1.5 μg
Folic acid	400 μg	200 μg
Iron	30 mg	14.8 mg (women), 8.7 mg (men)
Zinc	15 mg	9.5 mg
Copper	2 mg	1.2 mg
Selenium	65 μg	75 μg
Iodine	150 μg	140 μg

¹Composition of the trial medication (one tablet was given each day) compared with the UK recommended nutrient intake (RNI; from reference ​16). The RNI for vitamin D in healthy adults exposed to sunlight is probably zero if appropriate lipid precursors are present in the diet (16).