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In short, color cannot replace laboratory testing
The concentration of the resulting solution is determined by the diluent volume added
We do not recommend self-injection or unregulated product
This is because it requires conversion to the active form of vitamin B12
Initial effects typically manifest within the first week
Many adults can focus on reaching a reasonable daily intake of vitamin D through food, sunlight and modest supplements, without testing levels first, as long as they do not have specific risk factors
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