yes i put 1/4 cup in at night. I was suffering from bronchitis and it really helped me out, actually i was out of options and tried Antibiotics multiple times without sucess so thank God i stumbled upon the food grade h2o2. The 1/4 cup was 35% food grade and i mixed it with 1 gallon of distilled water. Also i do it now everytime i catch a cold and it works great..