A
Adam Krzystek
Researcher at ETH Zurich
Publications - 8
Citations - 159
Adam Krzystek is an academic researcher from ETH Zurich. The author has contributed to research in topics: Dietary Iodine & Iodine. The author has an hindex of 5, co-authored 7 publications receiving 76 citations. Previous affiliations of Adam Krzystek include École Polytechnique Fédérale de Lausanne.
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Journal ArticleDOI
GABA Production by Human Intestinal Bacteroides spp.: Prevalence, Regulation, and Role in Acid Stress Tolerance.
Nize Otaru,Nize Otaru,Kun Ye,Denisa Mujezinovic,Laura Berchtold,Florentin Constancias,Fabián A. Cornejo,Adam Krzystek,Tomas de Wouters,Christian Braegger,Christophe Lacroix,Benoit Pugin +11 more
TL;DR: It is shown that the production of GABA is regulated by pH, and that the GAD-system acts as a protective mechanism against acid stress in Bacteroides, mitigating cell death and preserving metabolic activity, and may represent the only amino acid-dependent acid tolerance system in Bactseroides.
Journal ArticleDOI
Optimization of a New Mass Spectrometry Method for Measurement of Breast Milk Iodine Concentrations and an Assessment of the Effect of Analytic Method and Timing of Within-Feed Sample Collection on Breast Milk Iodine Concentrations
Susanne Dold,Jeannine Baumgartner,Christophe Zeder,Adam Krzystek,Jennifer Osei,Max Haldimann,Michael B. Zimmermann,Maria Andersson +7 more
TL;DR: In iodine-sufficient women, BMIC shows low variation within a breast-feeding session, so timing of sampling is not a major determinant of BMIC, and (a) and (b) should not be used to measure BMIC.
Journal ArticleDOI
The main determinants of iodine in cows' milk in Switzerland are farm type, season and teat dipping.
Olivia L. van der Reijden,Valeria Galetti,Marie Hulmann,Adam Krzystek,Max Haldimann,Patrick Schlegel,Elisa Manzocchi,Joel Berard,Michael Kreuzer,Michael B. Zimmermann,Isabelle Herter-Aeberli +10 more
TL;DR: In order for milk to be a stable iodine source all year round, dietary iodine could be added at a set level to one feed component whose intake is regular and controllable, such as the mineral supplement, and by limiting the use of iodine-containing teat disinfectants.
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Iodine bioavailability from cow milk: a randomized, crossover balance study in healthy iodine-replete adults.
Olivia L. van der Reijden,Valeria Galetti,Sarah Bürki,Christophe Zeder,Adam Krzystek,Max Haldimann,Joel Berard,Michael B. Zimmermann,Isabelle Herter-Aeberli +8 more
TL;DR: Nearly all of the iodine in cow milk is iodide and although fractional iodine absorption from milk decreases with increasing dose, its bioavailability is high.
Journal ArticleDOI
Effects of feed iodine concentrations and milk processing on iodine concentrations of cows' milk and dairy products, and potential impact on iodine intake in Swiss adults.
Olivia L. van der Reijden,Valeria Galetti,Isabelle Herter-Aeberli,Michael B. Zimmermann,Christophe Zeder,Adam Krzystek,Max Haldimann,Andrea Barmaz,Michael Kreuzer,Joel Berard,Patrick Schlegel +10 more
TL;DR: Modulation of feed iodine levels can help achieve desirable iodine concentrations in milk and dairy products, and thereby optimise their contribution to human iodine nutrition to avoid both deficiency and excess.