vitamin b12 injections vitiligo Supplementation for 5 Facts About Vitamins for

Animal-derived foods provide the most reliable and bioavailable sources of this essential nutrient

The doctor may start you out at 1,000-2,000 micrograms a day

Side effects are generally rare but can include pain or swelling at the injection site, nausea, and headache

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Oral supplements must pass through the digestive system, which breaks down and limits nutrients

It's recommended that women who do not want to become pregnant keep using birth control until menopause or around age 50 to 55 years