Last Updated October 11th, 2019
What is vitamin b12?
Vitamin b12 is an essential nutrient vital to your nervous system and the level of red blood cells. It is also involved in the synthesis of DNA. Since it is required for the development of genetic material and tissues, this vitamin is of extreme importance in pregnant women and the developing fetus.
Why should you get tested for vitamin b12?
Though this essential vitamin is found abundantly in food, it is estimated that 15% of the American population might be deficient in vitamin b12. If someone shows symptoms of anemia such as fatigue, confusion, and irregular heartbeat, the doctor may prescribe this test. Additionally, if one shows classic symptoms of pernicious anemia such as pale skin and unexplained weight loss, he/she should ideally undergo this blood test.Also, if you have high serum folate levels (vitamin b9) then your doctor might ask you to undergo this test. This is because high folate levels can mask the symptoms of vitamin b12 deficiency causing it to become more serious and dangerous in the longer run.
What are the symptoms of vitamin b12 deficiency?
As mentioned above, the symptoms of vitamin b12 deficiency are seen as – fatigue, pallor, weakness, confusion, depressive tendencies, sudden weight loss, tingling/numbness in limbs, balance issues, oral sores, and loss of appetite.
What can cause vitamin b12 deficiency?
The most important factor in the absorption of vitamin b12 is the presence of healthy levels of stomach acid. If a person has insufficient or excessive levels of these digestive acids, there will be poor absorption of vitamin b12 in the body. Thus, having chronic digestive disorders such as celiac disease, Crohn’s disease, etc can lead to vitamin b12 deficiency. Similarly, if you have undergone a gastric bypass surgery there is a high risk of this deficiency. Several medications such as PPIs can also affect vitamin b12 absorption. Children and older adults also tend to absorb vitamin b12 poorly. It has been noted that vegans and vegetarians also show a high tendency of this nutrient deficiency. This is because meat and poultry products are the main sources of vitamin b12 in our diet.
How is the vitamin b12 test done?
Vitamin b12 test can be done as a blood test. In most cases, it is not required to fast before this test. However, in case the blood sample would be tested for other blood components such as CBC, then your doctor may ask you to refrain from consuming anything 6-8 hours before the test (except for water).
During the test, a blood sample is collected from the arm or the elbow. This area is cleaned with an antiseptic and in some cases, a tight band might be tied across the arm to increase the blood flow. A needle is inserted in the vein and a small sample of blood is drawn. The site of injection is covered with a small bandage.
How should one prepare for this test?
This is a very simple and routine test and requires no special preparation. If you are undergoing the blood test just for vitamin b12, you needn’t fast before the test. In case, this test has been coupled with few other tests, then depending on those fasting may or may not be required.
Is fasting required before undergoing vitamin b12 test?
No, there is no need to fast before a vitamin b12 blood test.
What is the cost of vitamin b12 test in India?
The general cost of vitamin b12 test in India lies between Rs. 800-1000.
What are the normal ranges of vitamin b12 in the body?
Vitamin b12 level is expressed in terms of pictograms/milliliter (pg/mL).