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Zinc absorption from breakfast flakes produced from sprouted or hydrothermally processed wheat : a randomized cross-over human intervention study

(2025) FOOD & FUNCTION. 16. p.9377-9389
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Abstract
Zinc (Zn) deficiency is a health issue worldwide. Although wheat is a valuable source of dietary Zn, its bioaccessibility is limited due to chelation with phytic acid. Steeping wheat at 15 degrees C for 36 h followed by sprouting at 26 degrees C for 48 h led to 26% phytate reduction and a 1.4-fold increase in Zn bioaccessibility. Hydrothermal processing of wheat at 60 degrees C and pH 4.0 for 24 h in a 0.1 M sodium citrate buffer reduced phytate content by 48% and increased Zn bioaccessibility 9.9-fold. Here, the potential of sprouting or hydrothermal processing of wheat to increase Zn absorption was studied in a human intervention study using a dual isotope technique in which breakfast flakes were extrinsically labeled with enriched stable isotopes of Zn. One group of participants consumed flakes from untreated and sprouted wheat (test group I, n = 24), whereas another group (test group II, n = 12) consumed flakes from untreated and hydrothermally treated wheat. Sprouting of wheat did not significantly increase fractional Zn absorption, while hydrothermal processing of wheat resulted in a 1.1-fold increase in fractional Zn absorption compared to untreated wheat. The modest if any increase in fractional Zn absorption resulting from sprouting or hydrothermal processing of wheat was likely due to high residual phytate : Zn molar ratios. These findings show that assessing phytate reduction and Zn bioaccessibility values of food products alone is not sufficient to predict Zn absorption from food products.
Keywords
STABLE-ISOTOPE, TRITICUM-AESTIVUM, PHYTASE ACTIVITY, IRON, BIOAVAILABILITY, GERMINATION, CALCIUM, BARLEY, ADULTS, MEALS

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MLA
Huyskens, Marie, et al. “Zinc Absorption from Breakfast Flakes Produced from Sprouted or Hydrothermally Processed Wheat : A Randomized Cross-over Human Intervention Study.” FOOD & FUNCTION, vol. 16, 2025, pp. 9377–89, doi:10.1039/d5fo03650j.
APA
Huyskens, M., Lemmens, E., Abou-Zeid, L., Hobin, K., Balsiger, L. M., Vanhaecke, F., … Delcour, J. A. (2025). Zinc absorption from breakfast flakes produced from sprouted or hydrothermally processed wheat : a randomized cross-over human intervention study. FOOD & FUNCTION, 16, 9377–9389. https://doi.org/10.1039/d5fo03650j
Chicago author-date
Huyskens, Marie, Elien Lemmens, Lana Abou-Zeid, Kasper Hobin, Lukas M. Balsiger, Frank Vanhaecke, Kristin Verbeke, Erik Smolders, and Jan A. Delcour. 2025. “Zinc Absorption from Breakfast Flakes Produced from Sprouted or Hydrothermally Processed Wheat : A Randomized Cross-over Human Intervention Study.” FOOD & FUNCTION 16: 9377–89. https://doi.org/10.1039/d5fo03650j.
Chicago author-date (all authors)
Huyskens, Marie, Elien Lemmens, Lana Abou-Zeid, Kasper Hobin, Lukas M. Balsiger, Frank Vanhaecke, Kristin Verbeke, Erik Smolders, and Jan A. Delcour. 2025. “Zinc Absorption from Breakfast Flakes Produced from Sprouted or Hydrothermally Processed Wheat : A Randomized Cross-over Human Intervention Study.” FOOD & FUNCTION 16: 9377–9389. doi:10.1039/d5fo03650j.
Vancouver
1.
Huyskens M, Lemmens E, Abou-Zeid L, Hobin K, Balsiger LM, Vanhaecke F, et al. Zinc absorption from breakfast flakes produced from sprouted or hydrothermally processed wheat : a randomized cross-over human intervention study. FOOD & FUNCTION. 2025;16:9377–89.
IEEE
[1]
M. Huyskens et al., “Zinc absorption from breakfast flakes produced from sprouted or hydrothermally processed wheat : a randomized cross-over human intervention study,” FOOD & FUNCTION, vol. 16, pp. 9377–9389, 2025.
@article{01KA0Q88MP0N4ZFKP81YGBXSN5,
  abstract     = {{Zinc (Zn) deficiency is a health issue worldwide. Although wheat is a valuable source of dietary Zn, its bioaccessibility is limited due to chelation with phytic acid. Steeping wheat at 15 degrees C for 36 h followed by sprouting at 26 degrees C for 48 h led to 26% phytate reduction and a 1.4-fold increase in Zn bioaccessibility. Hydrothermal processing of wheat at 60 degrees C and pH 4.0 for 24 h in a 0.1 M sodium citrate buffer reduced phytate content by 48% and increased Zn bioaccessibility 9.9-fold. Here, the potential of sprouting or hydrothermal processing of wheat to increase Zn absorption was studied in a human intervention study using a dual isotope technique in which breakfast flakes were extrinsically labeled with enriched stable isotopes of Zn. One group of participants consumed flakes from untreated and sprouted wheat (test group I, n = 24), whereas another group (test group II, n = 12) consumed flakes from untreated and hydrothermally treated wheat. Sprouting of wheat did not significantly increase fractional Zn absorption, while hydrothermal processing of wheat resulted in a 1.1-fold increase in fractional Zn absorption compared to untreated wheat. The modest if any increase in fractional Zn absorption resulting from sprouting or hydrothermal processing of wheat was likely due to high residual phytate : Zn molar ratios. These findings show that assessing phytate reduction and Zn bioaccessibility values of food products alone is not sufficient to predict Zn absorption from food products.}},
  author       = {{Huyskens, Marie and Lemmens, Elien and Abou-Zeid, Lana and Hobin, Kasper and Balsiger, Lukas M. and Vanhaecke, Frank and Verbeke, Kristin and Smolders, Erik and Delcour, Jan A.}},
  issn         = {{2042-6496}},
  journal      = {{FOOD & FUNCTION}},
  keywords     = {{STABLE-ISOTOPE,TRITICUM-AESTIVUM,PHYTASE ACTIVITY,IRON,BIOAVAILABILITY,GERMINATION,CALCIUM,BARLEY,ADULTS,MEALS}},
  language     = {{eng}},
  pages        = {{9377--9389}},
  title        = {{Zinc absorption from breakfast flakes produced from sprouted or hydrothermally processed wheat : a randomized cross-over human intervention study}},
  url          = {{http://doi.org/10.1039/d5fo03650j}},
  volume       = {{16}},
  year         = {{2025}},
}

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