Maybe it is a reaction of hydrogen sulfate to release oxygen.
http://www.thefinchleyclinic.co.uk/nojavaascriipt/products/Oxygen_Elements_Plus_ingredients.htm
Global Health Trax Proprietary Blend 326mg (Ionic Trace Elements, Acid Blend of Citric Acid, Gluconic Acid, Rice Vinegar, Hydrogen Sulfate, Fulvic Acid, Purified Water, Amino Acid Blend, Enzyme Blend).
Acid Blend: Citric Acid, Gluconic Acid, Rice Vinegar, and Hydrogen Sulfate, Purified Water [End]
[retrieve this message]