You may have health issues that interfere with your bodys ability to absorb the nutrient, you might not be getting enough in your diet, or you could be taking drugs that lower the levels of B12 in your body
Symptoms of impaired digestion and absorption, anxiety, chronic fatigue, and chemical/environmental sensitivities may be seen as well
It is sold exclusively as a research tool compound for in vitro laboratory use and is not intended for human consumption
Methylcobalamin is a naturally occurring form of B12, and it is the most bioavailable
Allergic reactions to proprietary preparations of vitamin B12 might be due to substances added to the solutions as preservatives or for other reasons, to impurities from the production, or to the vitamin B12 itself
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