My thanks to all who responded. It's great reading about others' experiences. I drank 2 drops 35% food grade in 8 oz water yesterday, as well as cleaning my teeth and gargling with 3% and taking a bath with a cup of 35% a few days ago. I do believe that I am feeling more energetic. I'm coughing a lot, which I have done for a few years now, but I feel the coughing is expelling more than just irritation. I'll be taking this slowly and carefully.