Maybe. When I have used Oxypowder , or have had very loose bowel movements, and this has occurred right after a die off period, I would notice a lot of very very white foam in my stools. When I flush, the foam congregates in the center of the whirl as it goes down, instead of breaking up. Also, (sorry to be gross) but if, say, the phone rings or something and I end up not flushing right away, if it were just air, I would assume it would just dissipate, but it does not. It may becomoe "invisible", but if I flush, it becomes visible again as it goes down. Due to the timing of when I see it, and the fact that it is like neon white, I'm putting my money on candida.