Zell Oxygen® is not a mixture of individual substances. Dr. Wolz® enzyme yeast cells are cultivated using a special multi-day oxygen-enzyme fermentation process. One tablespoon (10 ml) contains approximately 66 billion Dr. Wolz® enzyme yeast cells. Unlike yeast tablets, Dr. Wolz® enzyme yeast cells do not undergo any drying or extraction process. The vitamins contained in Zell Oxygen® contribute to energy metabolism and the reduction of tiredness and fatigue. Ingredients: Yeast cells* 65%, fruit juice concentrate (orange, grapefruit, lemon), apple juice from apple juice concentrate, inactivated dried yeast cells, wheat germ oil 1.5%, acerola juice powder, nicotinamide, vitamin B12 * Dr. Wolz® enzyme yeast cells