Has it been 70 days or do you have 70 days? I was able to start showing negative tests after 7 days. I am 6' 225 and have some flab. I have been doing cardio for 2 months now. 3 days a week. I am not a lifetime smoker but everyday for 45 days before stopping. But like I said I was doing cardio to loose some weight and I think that helped me. Best thing to do is buy home tests and see for yourself