Natural First Aid Where Science Works Naturally Relieves Most Minor Skin Irritations Plus Vitamins A, C, D & E This formulation relieves most minor skin irritations, promotes healthy tissue, and provides protection from unwanted skin conditions. NutriBiotic Skin Ointment contains lysine, vitamins A, C, D & E, plus 2% Citricidal brand grapefruit seed extract. These ingredients are used by healthcare professional worldwide to help protect the health of the human body including its largest organ, the skin.