caa a22 4500 388062533 CHVBK 20180307125125.0 cr unu---uuuuu 161130e199812 xx s 000 0 eng 10.1017/S0007114598001627 doi S0007114598001627 pii (NATIONALLICENCE)cambridge-10.1017/S0007114598001627 Iodine intake and iodine deficiency in vegans as assessed by the duplicate-portion technique and urinary iodine excretion [Elektronische Daten] I intake and I deficiency were investigated in thirty vegans (eleven males and nineteen females) consuming their habitual diet. I intake was estimated using the chemical analysis of 4 d weighed duplicate diet collections. The probability of I-deficiency disorders (IDD) was judged from the measurement of urinary I excretion in 24 h urine specimens during the 4 d. There was wide variation in I intake. Mean I intake in males was lower than the reference nutrient intake (RNI; Department of Health, 1991) and mean intake in females was above the RNI, although 36% males and 63% females had I intakes below the lower RNI. Mean I intake in subjects who consumed seaweed (n 3) was in excess of the RNI, and approached the provisional maximum tolerable daily intake (World Health Organization/Food and Agriculture Organization Joint Expert Committee on Food Additives, 1989). The probability of IDD in the group investigated was moderate to severe: three of five subgroups were classified as moderate and two subgroups were classified as severe IDD possibility. The findings highlight that vegans are an ‘at risk' group for I deficiency. The I status of vegans and the subclinical effects of low I intakes and infrequent high I intakes on thyroid function in this group should be further studied. Our work has also raised the question of adequate I intakes in groups where cow's milk is not consumed, and has exposed a need for more research in this area. Copyright © The Nutrition Society 1998 Vegans nationallicence Iodine nationallicence Nutrient intake nationallicence Lightowler Helen J. Nutrition Research Centre, School of Applied Science, South Bank University, 103 Borough Road, London SE1 0AA, UK Davies G. Jill Nutrition Research Centre, School of Applied Science, South Bank University, 103 Borough Road, London SE1 0AA, UK British Journal of Nutrition Cambridge University Press 80/6(1998-12), 529-535 0007-1145 80:6<529 1998 80 BJN https://doi.org/10.1017/S0007114598001627 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0007114598001627 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lightowler Helen J. Nutrition Research Centre, School of Applied Science, South Bank University, 103 Borough Road, London SE1 0AA, UK NATIONALLICENCE 700 1- Davies G. Jill Nutrition Research Centre, School of Applied Science, South Bank University, 103 Borough Road, London SE1 0AA, UK NATIONALLICENCE 773 0- British Journal of Nutrition Cambridge University Press 80/6(1998-12), 529-535 0007-1145 80:6<529 1998 80 BJN CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge