Additionally, while rare, high doses of B12 can sometimes cause a temporary drop in potassium levels (hypokalemia) as the body ramps up the production of new red blood cells
Often the required dose depends on the primary cause of hypocobalaminemia, so serum cobalamin levels should be monitored before and after the described protocol
Gastroenterology 5 (142), 216
Unlike oral supplements, which have to go through the digestive system and can be affected by factors like stomach acid and digestive enzymes, injections deliver the vitamin directly into your bloodstream
It is not recommended to take tetracycline and vitamin B12 simultaneously, and the reason is that tetracycline will interfere with the effectiveness and absorption of vitamin B12
Underdosed or impure batches produce inconsistent results regardless of when you take them