Vitamin B12 is crucial to health, especially in the areas of metabolic and cellular processes, red cell blood production, nerve, and neurological function.
Although you don’t need much, Vitamin B12 deficiencies are surprisingly common, especially for people following plant-based diets as B12 is primarily found in meat, fish and dairy.
Vitamin B12 deficiencies generally happen one of two ways. Either a person is not getting enough B12 in their diet, or they are simply not metabolizing the B12 they are taking in.
Absorption issues can result from inadequate intrinsic factor (aka I.F, a protein secreted in the stomach which works with B12), digestive enzyme issues, or organ damage from chronic illness like Crohn’s Disease and Celiac Disease among others.
Symptoms of deficiency vary depending on severity. The most common include fatigue, constipation, decreased appetite, tingling in the hands and feet, impaired memory, depression, and soreness of the tongue.