Kesehatan Vegan – Minimarket Vegan – dr. Satyawira Aryawan Deng

Makanan Sehat, Kacang-Kacangan, Biji-Bijian, Buah Kering, Organik, Natural, MPASI, Grosir & Eceran

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Penelitian Tumbuhan Rumput laut : dried purple laver (nori) mengandung vitamin B12 yang baik dan dapat meningkatkan status B12 untuk vegan

Br J Nutr. 2001 Jun;85(6):699-703.
Feeding dried purple laver (nori) to vitamin B12-deficient rats significantly improves vitamin B12 status.
Takenaka S1, Sugiyama S, Ebara S, Miyamoto E, Abe K, Tamura Y, Watanabe F, Tsuyama S, Nakano Y.
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To clarify the bioavailability of vitamin B12 in lyophylized purple laver (nori; Porphyra yezoensis), total vitamin B12 and vitamin B12 analogue contents in the laver were determined, and the effects of feeding the laver to vitamin B12-deficient rats were investigated. The amount of total vitamin B12 in the dried purple laver was estimated to be 54.5 and 58.6 (se 5.3 and 7.5 respectively) microg/100 g dry weight by Lactobacillus bioassay and chemiluminescent assay with hog intrinsic factor respectively. The purple laver contained five types of biologically active vitamin B12 compounds (cyano-, hydroxo-, sulfito-, adenosyl- and methylcobalamin), in which the vitamin B12 coezymes (adenosyl- and methylcobalamin) comprised about 60 % of the total vitamin B12. When 9-week-old vitamin B12-deficient rats, which excreted substantial amounts of methylmalonic acid (71.7(se 20.2) micromol/d) in urine, were fed the diet supplemented with dried purple laver (10 microg/kg diet) for 20 d, urinary methylmalonic acid excretion (as an index of vitamin B12 deficiency) became undetectable and hepatic vitamin B12 (especially adenosylcobalamin) levels were significantly increased. These results indicate that vitamin B12 in dried purple laver is bioavailable to rats.
PMID: 11430774 [PubMed – indexed for MEDLINE]

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Mitos & Fakta tentang Vitamin B12

Myths and Facts about Vitamin B-12
by Valerie Copeland, TVS

Most of us know that vegetarians live longer, and have less cancer, heart disease, and risk of stroke. Vegetarian (including vegan) meals supply adequate amounts of all the nutrients that we need – with the possible exception of Vitamin B-12, which is important for making red blood cells and maintaining the nervous system.

Vitamin B-12 is an essential vitamin that is only produced by microorganisms such as bacteria, fungi and algae; animals and plants cannot synthesize B-12 (animals are B-12 sources to non-vegetarians because animals ingest microorganisms). Unwashed vegetables may also contain significant sources if they are contaminated with B-12 containing bacteria. However, in developed countries where vegetables are washed during harvest, these bacteria are easily lost. Continue reading

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A-Z Tentang Vit B12

referensi :

Below is summary of what people on a plant-based diet should know about vitamin B12. For more detailed information, see:

An in-depth look at B12 and plant-based diets

by Health Professionals & Vegan Organizations Continue reading