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Large Iodine Variability in Retail Cows’ Milk in the U.S.: A Follow-Up Study among Different Retail Outlets

In a previous study, large variability in iodine content was found among samples of store brand retail milk at a single time point in a sampling taken from 24 nationwide U.S. locations for the USDA FoodData Central database, but the sampling plan was not designed to detect differences among location...

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Autores principales: Roseland, Janet M., Phillips, Katherine M., Vinyard, Bryan T., Todorov, Todor, Ershow, Abby G., Pehrsson, Pamela R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10383396/
https://www.ncbi.nlm.nih.gov/pubmed/37513495
http://dx.doi.org/10.3390/nu15143077
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author Roseland, Janet M.
Phillips, Katherine M.
Vinyard, Bryan T.
Todorov, Todor
Ershow, Abby G.
Pehrsson, Pamela R.
author_facet Roseland, Janet M.
Phillips, Katherine M.
Vinyard, Bryan T.
Todorov, Todor
Ershow, Abby G.
Pehrsson, Pamela R.
author_sort Roseland, Janet M.
collection PubMed
description In a previous study, large variability in iodine content was found among samples of store brand retail milk at a single time point in a sampling taken from 24 nationwide U.S. locations for the USDA FoodData Central database, but the sampling plan was not designed to detect differences among locations. This follow-up study was carried out to evaluate iodine levels in retail milk across the U.S. over time. Milk samples (2% fat) were collected bimonthly in fourteen locations for one year and analyzed in duplicate. Control materials were used to support accuracy of results and ensure precision across analytical batches. The overall mean and standard error (SE) for iodine concentration were 82.5 (7.0) µg/240 mL serving, which was comparable to the previous national mean [85.0 (5.5) µg/240 mL]. A similar wide range among individual samples was detected (27.9–282 µg/240 mL). For some locations, the mean iodine concentration differed significantly from others, and differed from the national average by amounts ranging from −47 µg to +37 µg per serving. The between-sample range within location was large for some (up to 229 µg/serving) and minimal for others (as little as 13.2 µg/serving). These findings suggest iodine intake from some retail milk supplies could be over- or underestimated relative to the national average, even if the national average is suitable for population-wide intake estimates.
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spelling pubmed-103833962023-07-30 Large Iodine Variability in Retail Cows’ Milk in the U.S.: A Follow-Up Study among Different Retail Outlets Roseland, Janet M. Phillips, Katherine M. Vinyard, Bryan T. Todorov, Todor Ershow, Abby G. Pehrsson, Pamela R. Nutrients Brief Report In a previous study, large variability in iodine content was found among samples of store brand retail milk at a single time point in a sampling taken from 24 nationwide U.S. locations for the USDA FoodData Central database, but the sampling plan was not designed to detect differences among locations. This follow-up study was carried out to evaluate iodine levels in retail milk across the U.S. over time. Milk samples (2% fat) were collected bimonthly in fourteen locations for one year and analyzed in duplicate. Control materials were used to support accuracy of results and ensure precision across analytical batches. The overall mean and standard error (SE) for iodine concentration were 82.5 (7.0) µg/240 mL serving, which was comparable to the previous national mean [85.0 (5.5) µg/240 mL]. A similar wide range among individual samples was detected (27.9–282 µg/240 mL). For some locations, the mean iodine concentration differed significantly from others, and differed from the national average by amounts ranging from −47 µg to +37 µg per serving. The between-sample range within location was large for some (up to 229 µg/serving) and minimal for others (as little as 13.2 µg/serving). These findings suggest iodine intake from some retail milk supplies could be over- or underestimated relative to the national average, even if the national average is suitable for population-wide intake estimates. MDPI 2023-07-08 /pmc/articles/PMC10383396/ /pubmed/37513495 http://dx.doi.org/10.3390/nu15143077 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Brief Report
Roseland, Janet M.
Phillips, Katherine M.
Vinyard, Bryan T.
Todorov, Todor
Ershow, Abby G.
Pehrsson, Pamela R.
Large Iodine Variability in Retail Cows’ Milk in the U.S.: A Follow-Up Study among Different Retail Outlets
title Large Iodine Variability in Retail Cows’ Milk in the U.S.: A Follow-Up Study among Different Retail Outlets
title_full Large Iodine Variability in Retail Cows’ Milk in the U.S.: A Follow-Up Study among Different Retail Outlets
title_fullStr Large Iodine Variability in Retail Cows’ Milk in the U.S.: A Follow-Up Study among Different Retail Outlets
title_full_unstemmed Large Iodine Variability in Retail Cows’ Milk in the U.S.: A Follow-Up Study among Different Retail Outlets
title_short Large Iodine Variability in Retail Cows’ Milk in the U.S.: A Follow-Up Study among Different Retail Outlets
title_sort large iodine variability in retail cows’ milk in the u.s.: a follow-up study among different retail outlets
topic Brief Report
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10383396/
https://www.ncbi.nlm.nih.gov/pubmed/37513495
http://dx.doi.org/10.3390/nu15143077
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