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For most research purposes the difference is negligible, but precision protocols should account for it
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Role of Vitamin B12: It has the function of transmethylating, participating in carbohydrate, fat and other metabolism, participating in the biosynthesis of essential amino acids and proteins, and promoting the development and maturation of red blood cells
This high volume increases contamination risks without consistent sterile practices
Evidence comparing these different routes of supplementation show them to be equally effective so people can choose whichever they find most convenient.
The most-studied effect
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