Vitamin A raises the resistance of the mucous membranes of the nose and throat to cold and cough infections. The only cough drops containing Vitamin A are Smith Brothers Cough Drops. Black or Menthol
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Vitamin A raises the resistance of the mucous membranes of the nose and throat to cold and cough infections. The only cough drops containing Vitamin A are Smith Brothers Cough Drops. Black or Menthol
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