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Today, I encounter much fewer cases of vitamin B12 deficiency, but there are still many vegans who havent received the news or neglect it

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It has to be noted that the inherent absorbance of the crude extract is considered to be independent of the signal being monitored, as the PMA assay is highly selective for the formation of the PMA red product at 852 nm

Spirulina is not a good source of B12 and only contains B12 analogues Because vitamin B12 is water-soluble it's extremely hard to overdose, and because the body is quite inefficient at absorbing B12, supplements often contain 10,000% RDA, sometimes even 100,000% RDA, to try and ensure the body actually absorbs some of it