Korean J Nutr.  2012 Feb;45(1):94-102. 10.4163/kjn.2012.45.1.94.

Vitamin B12 Content Using Modified Microbioassay in Some Korean Popular Seaweeds, Fish, Shellfish and Its Products

• Kwak CS
• Park JH
• Cho JH

• KMID: 2268626
• DOI: http://doi.org/10.4163/kjn.2012.45.1.94

Abstract

There is a limitation to estimate vitamin B12 intake due to a lack of data on vitamin B12 content in many Korean foods. In this study, vitamin B12 content was determined in some seaweeds, fish, and shellfish and their product that are consumed in Korea using a modified microbioassay with Lactobacillus delbruecki ATCC 7830. Dried laver and dried seasoned and toasted laver contained very high levels of vitamin B12 (66.8 and 55.2-71.3 microg/100 g, respectively. Sea lettuce and seaweed fulvescene also contained high vitamin B12 content of 5.47-9.41 and 6.46-7.20 microg/100 g, respectively, whereas sea mustard and sea tangle contained low levels of vitamin B12; vitamin B12 was not detected in seaweed fusifome. Pacific saury, trout, sea-bass, or squid contained 12.01, 2.00, 0.49 and 2.33 microg vitamin B12/100 g, respectively. Ochellatus octopus, and naked sand lance contained 0.72-1.43 and 3.68 microg vitamin B12/100 g, respectively. Dried Alaska pollack contained 0.19-2.64 microg vitamin B12/100 g. Shellfish such as little neck clam and small ark shellfish contained high levels of vitamin B12 of 30.5-40.5 microg/100 g, and mussel and abalone contained 17.71 and 7.82 microg/100 g, respectively. Of unique Korean traditional fermented seafood products, salt-fermented products of squid (2.91 microg/100 g), clams (34.31 microg/100 g), Alaska pollack roe (9.98-12.02 microg/100 g), hairtail guts (4.58 microg/100 g) or small shrimp (0.58-1.55 microg/100 g), and fish sauce from anchovies (1.52-1.78 microg/100 mL), sand eel (0.22-0.24 microg/100 mL) or small shrimp (0.19-0.78 microg/100 mL) were analyzed. A few commercial brands of flying fish roe (0.73-1.73 microg/100 g), canned tuna (0.40 microg/100 g), and fried fish paste (0.25-0.69 microg /100 g) were also analyzed. In conclusion, vitamin B12 content in these foods, chosen considering the Korean food culture, should contribute to improve the present vitamin B12 food database. It may be helpful to estimate vitamin B12 intake more correctly than before, and provide additional information for dietary education related to vitamin B12 and meal management.

Keyword

vitamin B12; seaweeds; seafood and it product; microbioassay

MeSH Terms

Alaska
Bivalvia
Decapodiformes
Diptera
Eels
Korea
Lactobacillus
Meals
Mustard Plant
Neck
Octopodiformes
Seafood
Seasons
Seaweed
Shellfish
Silicon Dioxide
Trout
Tuna
Ulva
Vitamin B 12
Vitamins
Silicon Dioxide
Vitamin B 12
Vitamins

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