You're right. You don't owe me anything.
But you do owe this forum something. A major, extraordinary claim like you've made--"NO side effects, none, and more efficient"--requires major and extraordinary proof, not just a statement. If you've provided any, I haven't seen it.
You're the one who came here and made these very major claims, all I asked for is something to back them up.
I realize we have a bit of a language barrier, and typing back and forth isn't really the best way to communicate every nuance we're trying to get across. I hope you see my point, though.
If I came up to you and said "Please buy my brand of gasoline--you'll get twice the mileage and your car will go faster and the paint will stay shinier", you'd want to see some proof. Same here. In medical and scientific matters, verifiable and repeatable written documentation is what matters most. Not claims and especially not testimonials. Faith healers have claims and can provide testimonials. I've seen preachers on middle-of-the-night television shows who claim that you can be cured if you buy and drink some of their mineral water.
I hope it turns out that it is better than BCGs. I hope your father does well with it.