Anyone can be deficient in vitamin B12, but the risk is higher if you have digestive disorders such as celiac or Crohn's disease, and pernicious anemia (an autoimmune disease that prevents the body to make intrinsic factor needed to absorb vitamin B12). Vegetarians are also at risk of vitamin B12 deficiency, because this vitamin is naturally only be obtained from the animal.Drugs used to treat
[Extracted from the webpage of www.healthscout.com] A pterygium is a fleshy growth that invades the cornea (the clear front window of the eye). It is an abnormal process in which the conjunctiva (a membrane that covers the white of the eye) grows into the cornea. A pinguecula is a yellowish patch or bump on the white of the eye, most often on the side closest to the nose. It is not a tumor but an alteration of normal tissue resulting in a deposit of protein and fat. Unlike a pterygium, a pinguecula does not actually grow onto the cornea. A pinguecula may also be a response to chronic eye irritation or sunlight. Although pterygium and pinguecula sound like mysterious, arcane diseases, they are actually quite common, usually benign eye conditions. These lesions appear as a whitish-yellowish bump or fleshy "growth" on the exposed conjunctiva. If the bump appears only on the white part of the eye, it is called a pinguecula. If it appears to "grow" onto t...
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