Medically reviewed by Edmund Khoo, DDS Key Takeaways Gargling with diluted 3% hydrogen peroxide is generally safe.It may help reduce cavities, fight infection, and ease sore throat pain.Avoid high ...

Hydrogen peroxide, first discovered in 1818 by French chemist Louis Jacques Thénard, has long been valued for its disinfecting and bleaching properties. While many people associate it primarily with ...