Citric acid and its diammonium, potassium and sodium salt help preserve cosmetics and personal care products by clelating (complexing) metals. Citric acid and its sales are also added to cosmetics to help adjust the acid/base balance. Caution: For external use only. Discontinue use if signs of irritations appear. Keep cool & dry. Keep out of children's reach. In case item is out of stock, please e-mail or WhatsApp 96695953 the amount you would like to order and when the fresh stock arrives, we will reserve and update you.