Hydrogen peroxide is ineffective in fighting the fungus responsible for oral thrush, reports Dr. Jeffrey S. McCombs. The yeast Candida actually produces hydrogen peroxide and is able to digest the chemical easily.
Although hydrogen peroxide is known for its ability to kill bacteria, viruses and yeasts, it has almost no effect on Candida fungus in the human mouth and has potential to cause internal damage if swallowed, according to Dr. McCombs. Candida produces its own hydrogen peroxide, which actually helps to convert the benign yeast form of Candida into the malignant fungal form. Because of this ability, hydrogen peroxide has no effect on oral thrush caused by Candida. In fact, beneficial bacteria that compete with Candida are destroyed when hydrogen peroxide is used. Hydrogen peroxide is also not recommended because it can cause poisoning, resulting in burning of the mouth and throat; vomiting; and stomach bloating.
Oil pulling is an alternative to hydrogen peroxide for Candida infections, says Lisa Richards, author and expert in digestive health. Extra virgin coconut oil is recommended as it contains caprylic acid, an effective antifungal. The oil not only traps and kills the fungus but also efficiently removes the large amounts of dying organisms from the oral cavity.