Journal of Food Hygiene and Safety (한국식품위생안전성학회지)

The Korean Society of Food Hygiene and Safety (한국식품위생안전성학회)
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Effect of Blanching on Dietary Fiber and Free Sugar Content of Vegetables

  • Rheeno Lee (Department of Food Science and Technology, Jeonbuk National University) ;
  • YongSuk Kim (Department of Food Science and Technology, Jeonbuk National University)
  • Received : 2023.05.01
  • Accepted : 2023.05.16
  • Published : 2023.06.30
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Abstract

Vegetables are rich sources of dietary fiber, which exhibit various health benefits. In the Republic of Korea, vegetables are consumed after cooking using different methods. However, they are most commonly eaten raw or blanched. In this study, chamnamul, sesame leaf, Fischer's ragwort, burdock root, and garlic stem from Korea were analyzed according to the Korean Food Code, and changes in dietary fiber content after blanching were compared. Blanching reduced the total dietary fiber (TDF) content in chamnamul (from 3.67±0.03 to 2.61±0.14 g/100 g), burdock root (from 4.95±0.40 to 3.89±0.10 g/100 g), and sesame leaf (from 4.32±0.12 to 3.65±0.17 g/100 g), but increased it in Fischer's ragwort (from 6.09±0.49 to 6.43±0.01 g/100 g) and garlic stem (from 4.52±0.35 to 5.09±0.04 g/100 g). Sucrose, glucose, and fructose were detected in the vegetables; however, sesame leaf did not have sucrose. Fresh burdock root had the highest sucrose content (1.71±0.07 g/100 g) whereas garlic stem had the highest glucose and fructose content (1.65±0.02 and 1.73±0.02 g/100 g, respectively) compared with other vegetables. Upon blanching, the free sugar content of vegetables decreased for all sugars except for sucrose, which increased in Fischer's ragwort (from 0.10±0.01 to 0.14±0.01 g/100 g) and garlic stem (from 0.76±0.00 to 0.83±0.01 g/100 g). These results can provide information on blanching-associated changes in the content of dietary fiber and free sugar in foods prepared using these vegetables.

채소는 여러 건강상의 이점을 주는 식이섬유를 다량 함유하고 있다. 채소는 국내에서 다양한 형태로 섭취되고 있으며, 특히 생으로 먹거나 나물의 형태로 가장 많이 섭취되고 있다. 나물은 여러 조리 방법이 있는데, 가장 흔한 방법은 데치고 무치는 형식이다. 한국에서 나물로 흔히 섭취되는 국내산 참나물, 깻잎, 곰취, 우엉, 마늘쫑을 데친 후, 데친 채소와 생 채소를 한국 식품공전에 따라서 식이섬유와 유리당을 분석하고 비교하였다. 참나물, 우엉뿌리와 깻잎은 데친 후에 총 식이섬유가 감소하였으나, 곰취와 마늘쫑은 각각 6.09±0.49에서 6.43±0.01 g/100 g 과 4.52±0.35 에서 5.09±0.04 g/100 g으로 증가하였다. 유리당 분석 결과, 깻잎을 제외한 채소들에서 sucrose, glucose와 fructose가 검출되었으며, 깻잎은 sucrose가 검출되지 않았다. 분석한 채소들 중에서 sucrose 함량이 가장 높은 채소는 우엉 뿌리 (1.71±0.07 g/100 g) 였으며, glucose와 fructose는 각각 1.65±0.02 와1.73±0.02 g/100 g로 마늘쫑이 가장 높게 나타났다. 채소를 데친 후, 곰취 (0.10±0.01에서 0.14±0.01 g/100 g)와 마늘쫑 (0.76±0.00 에서0.83±0.01 g/100 g)에 함유된 sucrose를 제외한 다른 유리당 함량은 전부 감소하였다. 이 연구를 통해 채소를 데치면 채소에 함유된 유리당과 식이섬유의 함량이 증가하거나 감소할 수 있다는 것을 나타낼 수 있다. 또한, 이러한 영양 정보를 통해 소비자들에게 어떠한 조리 상태의 채소를 섭취할지 선택할 때에 도움을 줄 수 있을 것이다.

Keywords

Acknowledgement

This work was carried out with the support of "Cooperative Research Program for Agricultural Science & Technology Development (Project No. PJ013397032022)" Rural Development Administration, Republic of Korea.

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