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Calcium Ionization Characteristics and In vitro Bioavailability Derived from Natural Calcium Sources

천연칼슘소재의 이온화 특성 및 In vitro 칼슘 이용률

  • Jang, Se-Young (Dept. of Food Science and Technology, Keimyung University, KMF Co., Ltd.) ;
  • Jeong, Yong-Jin (Dept. of Food Science and Technology, Keimyung University, KMF Co., Ltd.)
  • 장세영 (계명대학교 식품가공학과, (주)KMF) ;
  • 정용진 (계명대학교 식품가공학과, (주)KMF)
  • Received : 2012.11.26
  • Accepted : 2013.03.08
  • Published : 2013.04.30

Abstract

This study examined the characteristics of ionized calcium and in vitro calcium bioavailability rate of calcium from four natural sources: shellfish shell, oyster shell, starfish, egg shell. The levels of dissolved calcium and calcium ions increased at different concentrations of natural calcium (up to 8.0% (w/v)). However, there were insignificant differences in the levels of dissolved calcium and calcium ions between samples at calcium concentrations above 8.0% (w/v). In addition, no significant differences were observed (depending on the calcium source and concentration) with an ionization yield of about 90%. The temperature of the solutions also had little influence on the ionization of calcium. The highest calcium ion content was observed when solutions were left to dissolve calcium for 18 hours. The highest in vitro calcium bioavailability rate achieved among the different calcium solutions was BS (67.3%), with overall bioavailability rates about two times higher than the rates observed in commercially sold calcium supplements and natural calcium. In addition, the in vitro calcium bioavailability rate for ionized calcium in market milk, soy milk, and orange juice was more than twice as high as calcium carbonate. Overall, we expect a high and diverse bioavailability of ionized calcium from natural resources.

본 연구에서는 4종의 천연칼슘소재를 이용하여 칼슘 이온화 특성 및 in vitro 칼슘 이용률을 조사하였다. 천연칼슘소재는 8.0%(w/v) 첨가농도까지 칼슘용해량과 칼슘이온 함량은 증가하였으나 이상의 농도에서는 큰 변화는 없었다. 또한 이온화율은 약 90%로, 칼슘소재와 첨가농도에 따른 큰 차이는 나타나지 않았다. 칼슘의 이온화에 용해온도는 큰 영향이 없었으며, 용해 18시간째 가장 높은 칼슘이온 함량을 나타났다. 칼슘액 중 BS의 in vitro 칼슘 이용률은 67.3%로 가장 높게 나타났으며, AS는 62.4%, DS는 57.9%, CS는 57.5%로 시판 칼슘제 및 천연칼슘소재에 비해서 약 2배 정도 높게 나타났다. 시판 우유, 두유 및 오렌지 주스의 in vitro 칼슘 이용률을 조사한 결과 탄산칼슘보다 이온화 칼슘액을 첨가한 구간에서 2배 이상 높게 나타났다. 따라서 천연칼슘소재의 이온화 칼슘은 생체 이용율이 높은 다양한 식품소재로 활용이 기대된다.

Keywords

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