VITAMINS

Online ISSN : 2424-080X
Print ISSN : 0006-386X

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Determination of vitamin B₁₂ content and identification of vitamin B₁₂ compounds in commercially available malted rice and bettara-zuke (Japanese radish pickled in malted rice) products

Kyohei Koseki, Tomohiro Bito, Yukihiro Umebayashi, Fumio Watanabe

2024Volume 98Issue 12 Pages 501-505
Published: December 25, 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_501

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While plant-derived foods do not contain vitamin B₁₂, some fermented plant-derived foods contain small amounts of vitamin B₁₂. However, it is unknown whether bettara-zuke and malted rice, which are fermented plant-derived foods using Aspergillus oryzae, contain vitamin B₁₂ compounds. Therefore, we determined vitamin B₁₂ content in bettara-zuke and malted rice using high-performance liquid chromatography after immunoaffinity purification of vitamin B₁₂ extracted from them. Then, we identified vitamin B₁₂ compounds contained in the purified samples using liquid chromatography-tandem mass spectrometry. The results showed that bettara-zuke and malted rice contained small amounts of vitamin B₁₂ and that the vitamin B₁₂ compound contained in them was physiologically active vitamin B₁₂. This study is the first to report that fermented plant-based foods which are made using koji mold, contain trace amounts of physiologically active B₁₂.

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A new clinical biomarker of vitamin D

Yu Cai, Akiko Kuwabara

2024Volume 98Issue 12 Pages 506-509
Published: December 25, 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_506

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[title in Japanese]

[in Japanese]

2024Volume 98Issue 12 Pages 510-511
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_510

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[title in Japanese]

[in Japanese]

2024Volume 98Issue 12 Pages 511
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_511_1

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[title in Japanese]

[in Japanese]

2024Volume 98Issue 12 Pages 511-512
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_511_2

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[title in Japanese]

[in Japanese]

2024Volume 98Issue 12 Pages 512-513
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_512

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[title in Japanese]

[in Japanese]

2024Volume 98Issue 12 Pages 513
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_513_1

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[title in Japanese]

[in Japanese]

2024Volume 98Issue 12 Pages 513-514
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_513_2

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[title in Japanese]

[in Japanese]

2024Volume 98Issue 12 Pages 514-515
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_514_2

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[title in Japanese]

[in Japanese]

2024Volume 98Issue 12 Pages 515-516
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_515

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese]

2024Volume 98Issue 12 Pages 516
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_516

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JOURNAL OF NUTRITIONAL SCIENCE AND VITAMINOLOGY Vol 70, No 5（October, 2024）

2024Volume 98Issue 12 Pages 517-522
Published: 2024
Released on J-STAGE: December 31, 2025

DOIhttps://doi.org/10.20632/vso.98.12_517

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