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the 20mg vial lowers the per-milligram cost for longer protocols
found only in foods of animal origin Foods that are high in vitamin B 12 (g/100g) include: Liver (2658) Beef and lamb (13 Chicken (trace) Eggs (12.5) Dairy foods (0.32.4) In normal humans the absorption of vitamin B 12 from foods has been shown to vary depending on the quantity and type of protein consumed
A vial left in a hot car has been outside its labeled conditions, and you cannot assess from the outside what that did to the seal
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