Candida albicans can survive in any pH environment of course but its the acidic low oxygen environment that causes it to produce acetaldehyde a toxin that anyone who has experienced a hangover can relate to.
If this were the case then we would all feel these effects all the time. Why? Because Candida is a normal part of everyone's body. It is kept in check though by the acids formed by our beneficial flora. These acids not only turn the Candida Growth gene off, but also keep the Candida in its benign (harmless) yeast form as opposed to the dangerous and aggressive fungal form created by an alkaline environment.