Vitamin B12 deficiency is common. While supplementing with injections is considered safe in most cases, here’s what you should know before you try it. Vitamin supplements are very popular. People ...

Vitamin B12 deficiency occurs when your body lacks enough of the vitamin on a daily basis. This can lead to a lack of healthy red blood cells. Red blood cells carry oxygen to and remove carbon dioxide ...

Pernicious anemia is an autoimmune condition that leads to a lack of red blood cells. A deficiency in vitamin B-12 causes it. This article explains the symptoms of pernicious anemia, and how it ...