Bioaccessibility of calcium in freeze-dried yogurt based snacks
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Bioaccessibility of calcium in freeze-dried yogurt based snacks. / Wang, Jing; Aalaei, Kataneh; Skibsted, Leif H.; Ahrné, Lilia M.
I: LWT, Bind 129, 109527, 2020.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › fagfællebedømt
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TY - JOUR
T1 - Bioaccessibility of calcium in freeze-dried yogurt based snacks
AU - Wang, Jing
AU - Aalaei, Kataneh
AU - Skibsted, Leif H.
AU - Ahrné, Lilia M.
PY - 2020
Y1 - 2020
N2 - A variety of yogurt based calcium-rich snacks were formulated with pectin, whey protein or casein ingredients and combinations hereof to provide a crisp food matrix after freeze-drying. The calcium content ranged from 0.28 g to 0.74 g/100 g snacks. Pectin and heating prior to freeze drying were found important to provide snacks with a suitable texture, in terms of crispness and hardness. A three step in vitro static digestion simulating oral, gastric and intestinal conditions showed that the snacks with high calcium content had the largest difference between soluble calcium at the beginning and at the end of the intestinal phase. The soluble calcium at the end of the intestinal phase corresponds to calcium bioaccessibility, while the difference between soluble calcium at the beginning and at end of the intestinal phase shows a competition between absorption and precipitation during transport through the intestine. Enzymatic hydrolysis during the intestinal phase is suggested to liberate calcium from proteins but not from pectin. Heat treatment at 90 °C prior to drying and addition of pectin had little or no effect on the calcium bioaccessibility from any of the snacks.
AB - A variety of yogurt based calcium-rich snacks were formulated with pectin, whey protein or casein ingredients and combinations hereof to provide a crisp food matrix after freeze-drying. The calcium content ranged from 0.28 g to 0.74 g/100 g snacks. Pectin and heating prior to freeze drying were found important to provide snacks with a suitable texture, in terms of crispness and hardness. A three step in vitro static digestion simulating oral, gastric and intestinal conditions showed that the snacks with high calcium content had the largest difference between soluble calcium at the beginning and at the end of the intestinal phase. The soluble calcium at the end of the intestinal phase corresponds to calcium bioaccessibility, while the difference between soluble calcium at the beginning and at end of the intestinal phase shows a competition between absorption and precipitation during transport through the intestine. Enzymatic hydrolysis during the intestinal phase is suggested to liberate calcium from proteins but not from pectin. Heat treatment at 90 °C prior to drying and addition of pectin had little or no effect on the calcium bioaccessibility from any of the snacks.
KW - Calcium bioaccessibility
KW - Free calcium
KW - Freeze-drying
KW - In vitro digestion
KW - Yogurt snacks
U2 - 10.1016/j.lwt.2020.109527
DO - 10.1016/j.lwt.2020.109527
M3 - Journal article
AN - SCOPUS:85084560880
VL - 129
JO - Lebensmittel - Wissenschaft und Technologie
JF - Lebensmittel - Wissenschaft und Technologie
SN - 0023-6438
M1 - 109527
ER -
ID: 242653630