Keratinizing metaplasia
Encyclopedia
Keratinizing metaplasia is a condition affecting the epithelial surfaces of the body. It is caused by a dietary deficiency of vitamin A
Vitamin A
Vitamin A is a vitamin that is needed by the retina of the eye in the form of a specific metabolite, the light-absorbing molecule retinal, that is necessary for both low-light and color vision...

, a fat-soluble vitamin that is most often found in fats, milk, and some leafy vegetables.
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