Helps Support Your Immune System. Airborne Original Effervescent Tablets help support your immune system with a crafted blend of Vitamin C and 13 vitamins, minerals & herbs. The effervescent formula offers fast-acting absorption, and is Gluten Free. They also come in a great-tasting Zesty Orange flavor. Directions: Drop 1 tablet in 4-6 fl. Oz. Of water, let dissolve (~1 minute), and drink. For lighter flavor, mix with more water.