Medications that reduce absorption of B12 metformin (for diabetes) and antacids (that reduce the amount of stomach acid) are the main ones
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Nerve Pain and Tingling (Neuropathy): Adequate B12 is required to repair the damaged myelin sheaths in small fiber neuropathy, which can help reduce sensations of numbness, burning, and tingling in the extremities
Extra vitamin B12 can be stored in the liver, and only small amounts are lost through your urine, sweat, or stools each day
Strength: 1000mcg per capsule
Freeze-thaw cycles are particularly destructive and should be absolutely avoided