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Some formulations tolerate room temperature for up to 30 days, but refrigeration is strongly preferred throughout
However, taking a supplement probably wont improve your health in these areas if your levels are already sufficient
Comparing costs of intramuscular and oral vitamin B12 administration in primary care: a cost-minimization analysis
Have certain medical conditions: Problems that can restrict vitamin B12 absorption include pernicious anemia (a rare autoimmune disease that keeps the body from making a protein necessary to absorb B12), digestive illnesses, such as celiac and Crohns diseases, and immune disorders such as lupus, among others
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