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The heart muscle tissue is frequently the first tissue in humans to suffer damage caused by selenium deficiency. When the cell membranes in the heart muscle tissue are damaged by the action of harmful free radicals (this is called oxidative damage), many of the healthy heart muscle cells are replaced by fibrous tissue. The resulting … Continue reading ""http://seleniumfacts.com/wp-content/uploads/2017/02/Middle-aged-woman-300x197.png