Wendy Ma1, Xuemei He2, Lewis Braverman2. 1. 1 Department of Biological Sciences, Wellesley College , Wellesley, Massachusetts. 2. 2 Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine , Boston, Massachusetts.
Abstract
BACKGROUND: Iodine is necessary for the production of thyroid hormones and is acquired through the diet. Cow's milk is a primary source of iodine in the U.S. diet. The objective of this study was to measure the iodine content in a variety of milk alternatives to determine whether milk alternatives contain iodine levels comparable to that of cow's milk. METHODS: Iodine levels from 30 different brands of milk alternatives from 16 different companies were measured by the spectrophotometric method of the Sandell-Kolthoff reaction. RESULTS: The 30 brands of milk alternatives contained an average of 3.1 ± 2.5 μg/250 mL (∼8 oz. or one cup, serving size) of iodine or 12.3 ± 10.1 μg/L (∼24 oz. or four cups, daily recommended serving for adequate calcium intake) of iodine. CONCLUSIONS: These results indicate that milk alternatives contain far less iodine than cow's milk. Individuals with restricted dairy product consumption are at risk for inadequate dietary iodine intake.
BACKGROUND:Iodine is necessary for the production of thyroid hormones and is acquired through the diet. Cow's milk is a primary source of iodine in the U.S. diet. The objective of this study was to measure the iodine content in a variety of milk alternatives to determine whether milk alternatives contain iodine levels comparable to that of cow's milk. METHODS:Iodine levels from 30 different brands of milk alternatives from 16 different companies were measured by the spectrophotometric method of the Sandell-Kolthoff reaction. RESULTS: The 30 brands of milk alternatives contained an average of 3.1 ± 2.5 μg/250 mL (∼8 oz. or one cup, serving size) of iodine or 12.3 ± 10.1 μg/L (∼24 oz. or four cups, daily recommended serving for adequate calcium intake) of iodine. CONCLUSIONS: These results indicate that milk alternatives contain far less iodine than cow's milk. Individuals with restricted dairy product consumption are at risk for inadequate dietary iodine intake.
Authors: Oliver C Witard; Sarah C Bath; Mariana Dineva; Laury Sellem; Ana-Isabel Mulet-Cabero; Laura H van Dongen; Ju-Sheng Zheng; Carina Valenzuela; Benoit Smeuninx Journal: Front Nutr Date: 2022-02-10