Evaluation of selenium in dietary supplements using elemental speciation

•Heated water extraction liberates relevant selenium forms.•Method capable of assessing selenium-enriched dietary supplement labelling and quality.•Quantifies critical selenium species and their respective oxidation products.•Robust methodology suitable for routine analysis of selenium-enriched diet...

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Published inFood chemistry Vol. 218; pp. 313 - 320
Main Authors Kubachka, Kevin M., Hanley, Traci, Mantha, Madhavi, Wilson, Robert A., Falconer, Travis M., Kassa, Zena, Oliveira, Aline, Landero, Julio, Caruso, Joseph
Format Journal Article
LanguageEnglish
Published England Elsevier Ltd 01.03.2017
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Abstract •Heated water extraction liberates relevant selenium forms.•Method capable of assessing selenium-enriched dietary supplement labelling and quality.•Quantifies critical selenium species and their respective oxidation products.•Robust methodology suitable for routine analysis of selenium-enriched dietary supplements. Selenium-enriched dietary supplements containing various selenium compounds are readily available to consumers. To ensure proper selenium intake and consumer confidence, these dietary supplements must be safe and have accurate label claims. Varying properties among selenium species requires information beyond total selenium concentration to fully evaluate health risk/benefits A LC-ICP-MS method was developed and multiple extraction methods were implemented for targeted analysis of common “seleno-amino acids” and related oxidation products, selenate, selenite, and other species relatable to the quality and/or accuracy of the labeled selenium ingredients. Ultimately, a heated water extraction was applied to recover selenium species from non-selenized yeast supplements in capsule, tablet, and liquid forms. For selenized yeast supplements, inorganic selenium was monitored as a means of assessing selenium yeast quality. A variety of commercially available selenium supplements were evaluated and discrepancies between labeled ingredients and detected species were noted.
AbstractList Selenium-enriched dietary supplements containing various selenium compounds are readily available to consumers. To ensure proper selenium intake and consumer confidence, these dietary supplements must be safe and have accurate label claims. Varying properties among selenium species requires information beyond total selenium concentration to fully evaluate health risk/benefits A LC-ICP-MS method was developed and multiple extraction methods were implemented for targeted analysis of common “seleno-amino acids” and related oxidation products, selenate, selenite, and other species relatable to the quality and/or accuracy of the labeled selenium ingredients. Ultimately, a heated water extraction was applied to recover selenium species from non-selenized yeast supplements in capsule, tablet, and liquid forms. For selenized yeast supplements, inorganic selenium was monitored as a means of assessing selenium yeast quality. A variety of commercially available selenium supplements were evaluated and discrepancies between labeled ingredients and detected species were noted.
Selenium-enriched dietary supplements containing various selenium compounds are readily available to consumers. To ensure proper selenium intake and consumer confidence, these dietary supplements must be safe and have accurate label claims. Varying properties among selenium species requires information beyond total selenium concentration to fully evaluate health risk/benefits A LC-ICP-MS method was developed and multiple extraction methods were implemented for targeted analysis of common "seleno-amino acids" and related oxidation products, selenate, selenite, and other species relatable to the quality and/or accuracy of the labeled selenium ingredients. Ultimately, a heated water extraction was applied to recover selenium species from non-selenized yeast supplements in capsule, tablet, and liquid forms. For selenized yeast supplements, inorganic selenium was monitored as a means of assessing selenium yeast quality. A variety of commercially available selenium supplements were evaluated and discrepancies between labeled ingredients and detected species were noted.
•Heated water extraction liberates relevant selenium forms.•Method capable of assessing selenium-enriched dietary supplement labelling and quality.•Quantifies critical selenium species and their respective oxidation products.•Robust methodology suitable for routine analysis of selenium-enriched dietary supplements. Selenium-enriched dietary supplements containing various selenium compounds are readily available to consumers. To ensure proper selenium intake and consumer confidence, these dietary supplements must be safe and have accurate label claims. Varying properties among selenium species requires information beyond total selenium concentration to fully evaluate health risk/benefits A LC-ICP-MS method was developed and multiple extraction methods were implemented for targeted analysis of common “seleno-amino acids” and related oxidation products, selenate, selenite, and other species relatable to the quality and/or accuracy of the labeled selenium ingredients. Ultimately, a heated water extraction was applied to recover selenium species from non-selenized yeast supplements in capsule, tablet, and liquid forms. For selenized yeast supplements, inorganic selenium was monitored as a means of assessing selenium yeast quality. A variety of commercially available selenium supplements were evaluated and discrepancies between labeled ingredients and detected species were noted.
Author Hanley, Traci
Caruso, Joseph
Mantha, Madhavi
Oliveira, Aline
Kassa, Zena
Wilson, Robert A.
Landero, Julio
Kubachka, Kevin M.
Falconer, Travis M.
AuthorAffiliation a US FDA Forensic Chemistry Center, Cincinnati, OH 45237, USA
b Minnesota Department of Agriculture, Saint Paul, MN 55155, USA
c University of Cincinnati, Department of Chemistry, Cincinnati, OH, USA
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Keywords Dietary supplement
Selenium
LC-ICP-MS
Speciation
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Notes Present address: University of Sao Carlos, Group of Applied Instrumental Analysis, Department of Chemistry, Sao Carlos, SP 13565-905, Brazil.
E-mail addresses: traci.hanley@ fda.hhs.gov (T. Hanley), madhavi.mantha@fda.hhs.gov (M. Mantha), robert.wilson@fda.hhs.gov (R.A. Wilson), travis.falconer@fda.hhs.gov (T.M. Falconer), zena.kassa@state.mn.us (Z. Kassa), alinefo@gmail.com (A. Oliveira), julio_landero80@yahoo.com (J. Landero).
Deceased.
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Snippet •Heated water extraction liberates relevant selenium forms.•Method capable of assessing selenium-enriched dietary supplement labelling and quality.•Quantifies...
Selenium-enriched dietary supplements containing various selenium compounds are readily available to consumers. To ensure proper selenium intake and consumer...
SourceID pubmedcentral
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pubmed
elsevier
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StartPage 313
SubjectTerms Dietary supplement
Dietary Supplements - analysis
Dietary Supplements - standards
Dose-Response Relationship, Drug
LC-ICP-MS
Selenic Acid - analysis
Selenium
Selenium - analysis
Selenium Compounds - analysis
Selenocysteine - analogs & derivatives
Selenocysteine - analysis
Selenomethionine - analysis
Speciation
Title Evaluation of selenium in dietary supplements using elemental speciation
URI https://dx.doi.org/10.1016/j.foodchem.2016.08.086
https://www.ncbi.nlm.nih.gov/pubmed/27719915
https://pubmed.ncbi.nlm.nih.gov/PMC5856448
Volume 218
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