A deficiency of vitamin B12 can limit your ability to think clearly about anything!

What is Vitamin B12 and Why Is It So Essential? Like all vitamins, B12 is an organic compound, made from carbons (as opposed to minerals, which are inorganic), and essential for our normal metabolic function and health. Also, like most vitamins, B12 plays a wide variety of roles in our metabolism. The short list of important effects B12 has on your health includes these: Vitamin B12 is essential for the manufacture of red blood cells; a deficiency leads to a characteristic kind of anemia Vitamin B12 is needed to support the normal function of nerve cells, and to manufacture myelin, the insulating material that surrounds some of our nerve cells and speeds neural transmission Vitamin B12 is required for the replication of DNA Each of these effects is obviously quite important, but note the third one in particular. When B12 is deficient, our DNA cannot replicate normally – meaning we can’t generate new, healthy cells. As a result, vitamin B12 deficiency can mimic all of the effects of aging. Manifestations Of Vitamin B12 Deficiency Common manifestations of vitamin B12 deficiency include weakness, numbness and tingling, fatigue, dizziness, swelling and irritation of the mouth and tongue, and irritability. Anemia can develop, as noted, but a high intake of folate can compensate for a deficiency of vitamin B12 and prevent anemia. The most serious manifestation of B12 deficiency is impaired brain function, due to the effects of B12 on nerve cells. Advanced B12 deficiency causes dementia severe enough to resemble Alzheimer’s disease. Generally, though, the dementia caused by B12 deficiency is completely reversible with supplementation. While folate can prevent B12-deficient anemia, it cannot prevent the dementia – only B12 itself can do that job. Difficulties With Vitamin B12 Absorption Vitamin B12 is found in animal foods (and fortified cereals), so vegans are vulnerable to deficiency. But the most important cause of deficiency has to do with the unique way B12 is absorbed. To get into the bloodstream, B12 must be escorted by a protein called intrinsic factor, produced by cells of the stomach. Many disorders of the stomach, such as gastritis, particularly common after age 50, can interfere with the production of intrinsic factor. This condition is called pernicious anemia. Medications that affect the stomach – such as aspirin, antacids and proton-pump inhibitors – can also interfere with intrinsic factor production and result in B12 deficiency. The commonly used diabetes medication, metformin (Glucophage), can do so as well. Health-care professionals are, of course, taught to be on the lookout for B12 deficiency, particularly in patients over age 50 with suggestive signs or symptoms. But health care is at its best when both clinician and patient are on the ball! I encourage an empowered, assertive role for all patients. If you are at all concerned about the possibility of B12 deficiency in yourself, or a loved one, ask … before you forget the question! Stacey ChillemiStacey Chillemi EXPERT Note: http://www.wholefoodcatalog.info/nutrient/vitamin_b12(cyanocobalamin)/foods/high/?gclid=CNPltd3LudECFYJjvAod-GADVw Foods High in Vitamin B12 (Cyanocobalamin) (per 100 g edible portion) Chum salmon (mefun)Chum salmon (mefun) 327.6 μg Purple laver (dried)Purple laver (dried) 77.6 μg Japanese anchovy (tazukuri)Japanese anchovy (tazukuri) 64.5 μg Short-necked clam, Canned product (in brine)Short-necked clam, Canned product (in brine) 63.8 μg Freshwater clam (raw)Freshwater clam (raw) 62.4 μg Ayu sweetfish (wild, viscera, raw)Ayu sweetfish (wild, viscera, raw) 60.3 μg Jackknife clam (raw)Jackknife clam (raw) 59.4 μg Bloody clam (raw)Bloody clam (raw) 59.2 μg Purple laver (seasoned and toasted)Purple laver (seasoned and toasted) 58.1 μg Purple laver (toasted)Purple laver (toasted) 57.6 μg Lamprey (dried)Lamprey (dried) 54.8 μg Chum salmon (sujiko)Chum salmon (sujiko) 53.9 μg Cattle, Offal (liver, raw)Cattle, Offal (liver, raw) 52.8 μg Short-necked clam (raw)Short-necked clam (raw) 52.4 μg Ayu sweetfish (wild, viscera, baked)Ayu sweetfish (wild, viscera, baked) 49.6 μg Surf clam (raw)Surf clam (raw) 47.5 μg Chum salmon (ikura)Chum salmon (ikura) 47.3 μg Hard clam (tsukudani)Hard clam (tsukudani) 45.4 μg Chicken, Offal (liver, raw)Chicken, Offal (liver, raw) 44.4 μg Japanese anchovy (niboshi)Japanese anchovy (niboshi) 41.3 μg < 1 … 39 >