Often used for short-term, readily identifiable medical conditions
If B12 levels were low to begin with, longer-term benefits like red blood cell production or nervous system support may take several weeks
Finally, many of the common prescription medications (including the aforementioned acid blockers, as well as antibiotics, synthetic estrogens, and even birth control pills ) we see as problematic for the thyroid, can also cause inflammation in the gut, further affecting our ability to extract nutrients from food, and result in nutrient deficiencies
Talk to your doctor before starting if you: Are allergic to B12 Have optic nerve issues (optic atrophy) Have blood in urine or polycythemia Are pregnant, breastfeeding, or trying to conceive Have low iron or folate, or an active infection Dosage, Concentration, Route of Administration Dosage: Always follow the guidance of a licensed medical provider for the correct dosage