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Effects of different cooking methods on the vitamin C content of selected vegetables

Effects of different cooking methods on the vitamin C content of selected vegetables Purpose – Vegetables are rich in vitamin C, but most of them are commonly cooked before being consumed. The objective of the present study was to evaluate the effects of three common cooking methods (i.e. steaming, microwaving, and boiling) on the vitamin C content of broccoli, spinach, and lettuce. Design/methodology/approach – 100 g of homogeneous pieces of broccoli, spinach, and lettuce was separately processed for 5 minutes by steaming, microwaving, and boiling. A simple UV analytical method was employed to determine the vitamin C content of the vegetables. Findings – Loss of vitamin C in broccoli, spinach, and lettuce during steaming was 14.3, 11.1, and 8.6 per cent, respectively, while the loss of vitamin C during boiling was 54.6, 50.5, and 40.4 per cent, respectively. During microwaving, loss of vitamin C in broccoli, spinach, and lettuce was 28.1, 25.5, and 21.2 per cent, respectively. Practical implications – This study shows that any raw vegetable contains the highest content of vitamin C compared to that of cooked one. Eating raw vegetables is the best way to obtain vitamin C. Cooking methods (i.e. steaming, microwaving, and boiling) have huge impacts on the vitamin C content of vegetables. Steaming is the best cooking method for retaining the vitamin C content in vegetables. Originality/value – This study evaluates for the first study the effects of three common cooking methods (i.e. steaming, microwaving, and boiling) on the vitamin C content of broccoli, spinach, and lettuce. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nutrition & Food Science Emerald Publishing

Effects of different cooking methods on the vitamin C content of selected vegetables

Chuli Zeng
Nutrition & Food Science , Volume 43 (5): 6 – Sep 6, 2013
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Publisher
Emerald Publishing
Copyright
Copyright © 2013 Emerald Group Publishing Limited. All rights reserved.
ISSN
0034-6659
DOI
10.1108/NFS-11-2012-0123
Publisher site
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Abstract

Purpose – Vegetables are rich in vitamin C, but most of them are commonly cooked before being consumed. The objective of the present study was to evaluate the effects of three common cooking methods (i.e. steaming, microwaving, and boiling) on the vitamin C content of broccoli, spinach, and lettuce. Design/methodology/approach – 100 g of homogeneous pieces of broccoli, spinach, and lettuce was separately processed for 5 minutes by steaming, microwaving, and boiling. A simple UV analytical method was employed to determine the vitamin C content of the vegetables. Findings – Loss of vitamin C in broccoli, spinach, and lettuce during steaming was 14.3, 11.1, and 8.6 per cent, respectively, while the loss of vitamin C during boiling was 54.6, 50.5, and 40.4 per cent, respectively. During microwaving, loss of vitamin C in broccoli, spinach, and lettuce was 28.1, 25.5, and 21.2 per cent, respectively. Practical implications – This study shows that any raw vegetable contains the highest content of vitamin C compared to that of cooked one. Eating raw vegetables is the best way to obtain vitamin C. Cooking methods (i.e. steaming, microwaving, and boiling) have huge impacts on the vitamin C content of vegetables. Steaming is the best cooking method for retaining the vitamin C content in vegetables. Originality/value – This study evaluates for the first study the effects of three common cooking methods (i.e. steaming, microwaving, and boiling) on the vitamin C content of broccoli, spinach, and lettuce.

Journal

Nutrition & Food Science – Emerald Publishing

Published: Sep 6, 2013

Keywords: Broccoli; Cooking; Lettuce; Spinach; Vitamin C

References

  • Effects of cooking methods and processing stages on vitamin C in traditional Lebanese meals
    Farhat, A.G.; Fossain, T.M.
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    Miglio, C.; Chiavaro, E.; Visconti, A.; Fogliano, V.; Pellegrini, N.
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    Somsub, W.; Kongkachuichai, R.; Sungpuag, P.; Charoensiri, R.
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    Vallejo, F.; Yomas‐Barberan, F.A.; Garcia‐Viguera, C.
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    Yuan, G.‐F.; Sun, B.; Yuan, J.; Wang, Q.‐M.
  • Nutrition Optimization for Health and Longevity
    Zeng, H.
  • Development and application of a novel UV method for the analysis of ascorbic acid
    Zeng, W.; Martinuzzi, F.; MacGregor, A.