Comparing the efficacy and tolerability of a new daily oral vitamin B12 formulation and intermittent intramuscular vitamin B12 in normalizing low cobalamin levels: a randomized, open-label, parallel-group study
Patients on Metformin : Patients with type 2 diabetes treated with metformin may experience reduced vitamin B12 absorption
Some of the best food sources of B vitamins include: Fish: salmon, tuna, mackerel Poultry: chicken, turkey Lean meat: beef or pork chops Leafy greens: kale, spinach Legumes: beans, lentils, peas B Vitamin Supplement Benefits While getting your vitamins from your foods is best, some people opt for supplements to increase their B vitamin intake
Community-reported effects (nausea, GI discomfort, headache) come only from anecdotal vendor/forum sources, not controlled studies
B12 Dosing in Patients with Renal Impairment People with kidney problems need to be careful with B12 doses