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La ventana de trabajo habitual en laboratorio se cuenta en semanas, no en meses, y debe fijarla el protocolo del propio estudio
However, a very small percentage of B12 from a supplemental dose is absorbed by passive diffusion, rather than by intrinsic factor, such that vegans can make up for taking B12 only once per day, or even only once per week, by taking larger doses than normally provided by food
& Whitehouse, M
Buying multiple 100mg vials makes sense if you plan extended research, expect to run multiple cycles annually, or have reliable freezer storage for long-term powder preservation
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