Your body needs vitamin B12 to produce red blood cells, as well as for brain and nervous system function. When your B12 are optimal, your brain and body function at their best; your cardiovascular system is more robust and your athletic performance improves. If you don’t get enough Vitamin B12, you may become anemic, causing you to feel tired and weak. Low levels of Vitamin B12 can also lead to skin numbness and tingling as well as impaired coordination. Vegans, and vegetarians have a higher risk of low levels of vitamin B12 in their blood. Athletes, especially women, who consume enough B12, are more capable of performing high intensity exercise. Taking too much vitamin B12 can cause problems such as reddened skin, rashes, headaches, and nausea. If you drink energy drinks or shots, you may be consuming far more B12 than you need. Although B12 occurs naturally only in animal products, vegetarians can get it from fortified cereals. InsideTracker will tell you what your vitamin B12 levels should be based on your age, gender, ethnicity, activity level, and lifestyle. More important, InsideTracker will tell you which foods rich in B12, such as salmon, milk, eggs, and fortified cereals, will fit your diet.show more
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