J R Soc Health. 2000 Jun; 120(2): 117-24.

Micronutrient intakes in a group of UK vegans and the contribution of self-selected dietary supplements.

Lightowler HJ, Davies GJ.

Nutrition Research Centre, School of Applied Science, South Bank University, London. lightohj@sbu.ac.uk

Micronutrient intakes and the contribution of self-selected dietary supplements were investigated in 26 vegans, comprising 17 non-supplement users (NSU) and nine supplement users (SU), consuming their habitual diet. Micronutrient intakes were estimated using a four-day weighed record and the contribution of self-selected dietary supplements was assessed according to the manufacturers' declarations on the packaging. Mean daily intakes from food sources were similar in NSU and SU. Dietary supplements significantly increased intakes of riboflavin (p < 0.05), niacin (p < 0.05), folate (p < 0.01), vitamin A (p < 0.05) and vitamin D (p < 0.05). The mean daily contribution of dietary supplements ranged from 7-1640% of the reference nutrient intake (RNI). Intakes of vitamin B12 and selenium (Se) were below the appropriate lower reference nutrient intake (LRNI) in 80% and 65% of NSU respectively. After supplements, 33% of SU remained below the LRNI for vitamin B12 and 33% below the LRNI for Se. Some vegans who took supplements were not taking certain micronutrients in amounts sufficient to meet the RNIs but were taking a mix of micronutrients, some of which they needed and others which they did not need. Some vegans who did not take supplements had a potential need for the addition of supplements to their diets. Advice on the appropriate usage of dietary supplements for those on a vegan diet is needed.