This study aimed to predict the shelf life of black soybean Sunsik to develop a functional labeling system for the product. The Arrhenius equation was used to calculate the shelf life by examining alterations in the dietary fiber and calcium levels of black soybean Sunsik stored at 25, 35, and 50°C for 0, 6, and 12 months. Dietary fiber and calcium analyses were performed according to the experimental methods specified in the Food Code of the Ministry of Food and Drug Safety. Both black soybean Sunsik (BS) and black soybean Sunsik containing nondigestible maltodextrin and calcium lactate (BSN) exhibited an upward trend in dietary fiber content after 12 months of storage, compared to their initial levels. During storage, the phytate in Sunsik degraded, releasing cations that facilitated the formation of new cross-links between pectic acid and middle lamella, which ultimately increased dietary fiber content. Conversely, the calcium contents of both BS and BSN decreased with prolonged storage. Based on these findings, the expected shelf life of BS and BSN was calculated as 15.65 and 28.34 months, respectively.

ABSTRACT
Materials and Methods
    실험재료 및 저장조건
    식이섬유 분석
    칼슘 분석
    소비기한 설정
Results and Discussion
    저장온도 및 저장기간에 따른 식이섬유 함량 변화
    저장온도 및 저장기간에 따른 칼슘 함량 변화
    반응속도 상수 및 소비기한 예측
국문요약
Acknowledgement
Conflict of interests
ORCID
References

• 이강표(㈜엄마사랑) | Kang-Pyo Lee (Motherlove Co., Ltd. Seoul, Korea)
• 인예원(㈜엄마사랑) | Ye-Won In (Motherlove Co., Ltd. Seoul, Korea)
• 임지현(강원대학교 식품환경융합학과) | Ji-Hyun Im (Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon, Korea)
• 이옥환(강원대학교 식품환경융합학과) | Ok-Hwan Lee (Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon, Korea) Corresponding author
• 이부용(차의과학대학교 식품생명공학과) | Boo-Yong Lee (Department of Food Science and Biotechnology, CHA Univercity, Seongnam, Korea) Corresponding author