The main affect that is best to avoid is immune system suppression, as this facilitates candida growth.
I have to disagree with this comment. The immune system is not a singular thing. It is actually comprised of numerous things including various white blood cells, various cytokines, various enzymes, various glands, peroxide, the flora, the stomach acid,....... Parts of the immune system can be suppressed without suppressing other components of the immune system. How the immune system is suppressed will determine what kind of health issues may possibly occur.
The part of the immune system that is primarily responsible for controlling Candida are the intestinal flora, which are not adversely affected by the stevia.