Adults 0.2-5.0 umol/L
Children (under 18yo) 0.3-6.0 umol/
Note that iodine concentration is a marker of recent intake and does not necessarily confirm insufficiency
WHO recommends urine iodine concentrations of 100-200 ug/L which is equivalent to 0.79-1.58 umol/L.
(Ref: WHO. Urinary iodine concentrations for determining iodine status deficiency in populations. Vitamin and Mineral Nutrition Information System. Geneva: World Health Organization; 2013 (http://www.who.int/nutrition/vmnis/indicators/urinaryiodine, accessed 23/2/16).)
In pregnancy, urinary iodine concentrations of 1.2 - 2 umol/L (150 -249 mcg/L) indicate adequate iodine intake(1).
1. WHO. Urinary iodine concentrations for determining iodine status deficiency in populations. Vitamin and Mineral Nutrition Information System. Geneva: World Health Organisations; 2013 (http://www.who.int/nutrition/vmnis/indicators/urinaryiodine)
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