A to Z Drops is widely used for vitamin a deficiency, use as a supplement to intravenous solutions given for total parenteral nutrition, Anorexia, Leg ulcers, Fever, Skin diseases, Acne, Diarrhea, Age related vision loss, Febrility. It works by facilitating retina formation required for low light and color vision, administering required vitamins for the body, increasing absorption of calcium and phosphorus required for strong bones.