The word sublingual comes from two Latin words meaning under the tongue, and sublingual B-12 refers to a vitamin supplement administered under your tongue. Because the B-12 is absorbed through the blood vessels under your tongue, it bypasses the usual delivery system of absorption through your stomach. An individual who has difficulty absorbing B-12 through her gastric system will often take sublingual B-12. Vitamin B-12 is needed for proper red blood cell formation and other functions.
Significance
Any of the several forms of B-12, collectively known as cobalamins because the element cobalt is a main component, are needed to make healthy red blood cells. RBCs carry oxygen-rich blood to all your organs and tissues. This vitamin also supports neurological function, tissue repair and DNA synthesis. It helps your body turn food into fuel and works with other B vitamins to keep your hair, skin, eyes and liver healthy.
Anemia
B-12 deficiency causes anemia, or a low red blood cell count. When your body does not circulate enough RBCs, your organs and tissues do not get enough oxygen. Poor diet, kidney failure and blood loss can also cause a decrease in the number of red blood cells. Anemia symptoms include fatigue, chest pain, dizziness, shortness of breath, constipation and tingling in your hands and feet. Your doctor can perform a test to evaluate your B-12 status.
Sources and RDA
The recommended dietary allowance is 2.4 mcg if you are an adult 19 years of age or older and 2.6 if you are pregnant, according to the University of Maryland Medical Center. Sublingual B-12 supplements are available and B-12 can be obtained mainly in animal foods. Dietary B-12 sources include fish, shellfish, dairy products, eggs, beef, pork and organ meats. You generally get enough B-12 in your diet unless you restrict all animal products.
Precautions
According to UMMC, B-12 is considered safe and nontoxic. No side effects are reported, however taking B-12 alone may decrease your blood levels of other B vitamins because they work together. It is generally recommended to take a B complex, which contains seven other B vitamins. B-12 may interact with diabetes medications. Consult your doctor before taking sublingual B-12 supplements, especially if you are on medication or have a chronic condition.
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