Sea lettuce (Ulva fenestrata) as a rich source of cobalamin (vitamin B12) – both as processed whole biomass and as an extracted protein ingredient
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| Title: | Sea lettuce (Ulva fenestrata) as a rich source of cobalamin (vitamin B12) – both as processed whole biomass and as an extracted protein ingredient |
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| Authors: | Trigo, João Pedro, 1995, Chamlagain, Bhawani, Thorén, Jonatan, Strand, Rebecca, 1999, Vall-Llosera Juanola, Mar, 1992, Steinhagen, Sophie, Kinnby, Alexandra, Toth, Gunilla B., Kariluoto, Susanna, Undeland, Ingrid, 1968 |
| Source: | Makroalger som bärare av näringsämnen i en cirkulär livsmedelskedja - innovativa steg mot ett proteinskifte (CirkAlg) Blå åkrar för en grön framtid -tång som en källa till hållbara livsmedel SensAlg - En sensorisk kunskapsgrund för ökad konsumtion av svenska makroalger Food Chemistry. 483 |
| Subject Terms: | Heat treatment, Biological active vitamin B12, Micronutrient, Macroalgae, Protein isolation, Post-harvest processing |
| Description: | The seaweeds Ulva fenestrata and Palmaria palmata are promising food items; however, it remains unclear whether both contain true vitamin B12 and how post-harvest processing, storage, and protein extraction affect this vitamin. UHPLC-UV-MS/MS analysis revealed that untreated Ulva contained 681 ± 37 ng B12/g dry weight (dw) - 22 times more than Palmaria. Biomass soaking (16 °C, 3 min) in freshwater did not affect B12 content, but blanching (60 °C, 3 min) reduced its content in Ulva by 45 % (dw basis) and 61 % (protein content basis). Oven-drying and freeze-drying equally preserved B12; both techniques maintained B12 content during room-temperature dark storage for 4.8 months. Protein extraction via a new method (Trigo et al., 2025) resulted in a dried ingredient containing 60 % more B12 than untreated Ulva, and 29 times more than red meat on a moisture-equivalent basis. All Ulva samples – including the protein ingredient – qualified for the EU nutritional claim “High in Vitamin B12”. |
| File Description: | electronic |
| Access URL: | https://research.chalmers.se/publication/546018 https://research.chalmers.se/publication/546018/file/546018_Fulltext.pdf |
| Database: | SwePub |
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