Both yeast powder and baking powder have the function of fermentation, but they are essentially different.

Yeast is a pure biological bulking agent and an active microorganism, which is harmless to human body. Chemical baking powder is a kind of chemical expanding agent, which generally refers to baking soda (sodium bicarbonate), smelly powder (ammonium bicarbonate), alum (aluminum potassium sulfate or aluminum potassium sulfate, S.A.S), baking powder and other substances.