| REFERENCE NUTRIENT INTAKES (RNI's) FOR MEN AND WOMEN AGED 19-50 YEARS (UK) In the table below, the "RNI" or Reference Nutrient Intake is a minimum amount of a vitamin or mineral to maintain health. For example the RNI for men for vitamin A is 700mg. 27% of men in the UK are not getting this amount as shown by the "%<RNI" column. Looking at potassium, 27% of women are getting less than the amount required to keep out of "serious biochemical abnormality" "%<LRNI" column.
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| Nutrient | Units | RNI | RNI | %<RNI | %<RNI | LRNI | LRNI | %<LRNI | %<LRNI |
| Men | Women | Men | Women | Men | Women | Men | Women | ||
| Vitamin A | mcg | 700 | 600 | 27 | 31 | 300 | 250 | ||
| Thiamin | mg | * | * | - | - | * | * | - | - |
| Riboflavin | mg | 1.3 | 1.1 | 12 | 21 | 0.8 | 0.8 | 1 | 8 |
| Niacin | mg | 17 | 13 | 1 | 2 | 11 | 9 | - | - |
| Vitamin B6 | mg | 1.4 | 1.2 | 6 | 22 | 1.0 | 0.8 | - | - |
| Vitamin B12 | mcg | 1.5 | 1.5 | 1 | 4 | 1.0 | 1.0 | 0 | 1 |
| Folate | mcg | 200 | 200 | 12 | 47 | 100 | 100 | 0 | 4 |
| Vitamin C | mg | 40 | 40 | 26 | 34 | 10 | 10 | 0 | 1 |
| Calcium | mg | 700 | 700 | 25 | 48 | 400 | 400 | 2 | 10 |
| Magnesium | mg | 300 | 270 | 42 | 72 | 190 | 150 | 8 | 13 |
| Potassium | mg | 3500 | 3500 | 65 | 94 | 2000 | 2000 | 6 | 27 |
| Iron | mg | 8.7 | 14.8 | 12 | 89 | 4.7 | 8 | 1 | 26 |
| Zinc | mg | 9.5 | 7 | 31 | 31 | 5.5 | 4 | 2 | 4 |
| Copper | mg | 1.2 | 1.2 | 24 | 59 | (a) | (a) | - | - |
| Iodine | mcg | 140 | 140 | 9 | 32 | 70 | 70 | 1 | 3 |
| Selenium | mcg | 75 | 60 | - | - | 40 | 40 | - | - |
Figures from studies in the 1990s including 1995 MAFF National Diet and Nutrition Survey
RNI is the Reference Nutrient Intake – the minimum amount of a substance deemed to be needed for health.
%<RNI is the percentage of the population surveyed who are not taking in the RNI of the nutrient concerned.
LRNI is the Lower RNI – the amount needed to keep out of serious biochemical abnormality.
%<LRNI is the percentage of the population surveyed who are not taking in the LRNI of the nutrient concerned