Vitamin B12 is present in animal products such as eggs, dry beans, yeast, red meat, citrus fruits, green leafy vegetables and milk. Thus being on a diet and being a vegan would strongly create a big impact on one’s intake of these therefore making them more prone to this deficiency. Another cause of this deficiency is the aging process, because as one gets older, he or she tends to absorb less quantity of vitamin B12. Thus, this would deny ones capability of the body to be stimulated for it to be energized.

This deficiency can lead to a blood disorder called pernicious anemia. Those who have this kind of disorder were not able to produce enough intrinsic factor that would allow their stomach to absorb vitamin B12. You body uses intrinsic factor, a special protein that's released by the cells in the stomach. Besides making red blood cells and making sure that our nervous system is healthy, vitamin B12 also helps our body to release energy and to absorb folic acid.

There are symptoms that a person should observe and try to consider as this might be a sign of having the vitamin B12 deficiency. Experiencing fatigue, shortness of breath, pale skin, loss of appetite constipation or diarrhea and palpitations are some of these common signs.

Tests such as CBC, Reticulocyte count, Schilling test, Serum LDH, Serum vitamin B12 level and serum folate levels are to be done for one to know if he or she has acquired this deficiency. And as of today, Vitamin B12 deficiency can either be treated through drinking vitamin supplements paired with balanced diet. Also, there are B12 injections that are offered in the market for a more effective and immediate results. Also, B12 is also a good tool for weight loss. You can see more information about B12 and other weight loss regimes you can use here