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
Unlike deficiency states, which produce well-characterised neurological and haematological symptoms, there is no clearly defined clinical syndrome associated with B12 excess from supplementation alone
Issues like pernicious anemia and some gut problems can also cause it
If you have known absorption issues or medical conditions, work with a healthcare provider to determine the ideal route and dosage for your needs
Most medical weight loss programs recommend a minimum of 4 to 12 weekly injections as an initial course
NG239 Evidence: Tests for identifying cause of vitamin B12 deficiency (PDF)