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Food Sci Biotechnol. 2017 Dec 12;27(2):333-342. doi: 10.1007/s10068-017-0281-1. eCollection 2018 Apr.

Effect of different cooking methods on the content of vitamins and true retention in selected vegetables.

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1Division of Food and Animal Sciences, College of Agriculture, Life, and Environmental Sciences, Chungbuk National University, 1 Chungdae-ro, Seowon-gu, Cheongju, Chungbuk 28644 Korea.
2National Academy of Agricultural Science, Rural Development Administration, Jeonju, Jeonbuk 55365 Korea.


This study evaluated the effect of different cooking methods including blanching, boiling, microwaving and steaming on the content of vitamins in vegetables. True retention was estimated using the yield expressed as a ratio of the weight of the cooked sample to the weight of the raw sample. The retention of vitamin C ranged from 0.0 to 91.1% for all cooked samples. Generally, higher retention of vitamin C was observed after microwaving with the lowest retention recorded after boiling. Cooked vegetables were occasionally higher contents of fat-soluble vitamins, including α-tocopherol and β-carotene, than that of their fresh counterparts, but it depends on the type of vegetables. Microwave cooking caused the greatest loss of vitamin K in crown daisy and mallow; in contrast, it caused the least loss of vitamin K in spinach and chard. Cooking may cause changes to the contents of vitamins, but it depends on vegetables and cooking processes.


Cooking; Retention; Vegetables; Vitamins

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