“I dare not put hydrogen peroxide in mouth but it is highly effective to cure fire ant bites.”
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I swish HP 3% in my mouth after I floss. I’ve been doing it for years. They warn that you will get “black tongue” from doing it, but I have not.
HP comes in 3% and 70%. 3% is fine to rinse and gargle with. 70% needs to be diluted to use as a topical disinfectant. Not orally.