Define Urinary Excretion Test - Thiamin Status?
The urinary excretion of thiamin is an index of recent dietary intake of the vitamin. Hence, determination of thiamin in urine samples, 4 hours after the administration of a 5 nlg dose of the vitamin, for a period of 24 hours, is a reliable index of thiamin status. An excretion value <20 mcg is indicative indicative of thiamine deficiency.