I started the 5 day detox program 9 days after not smoking. Prior to that I smoked about a blunt a day for 5/7 days for 4 months. I took my experimentation on the 16th day of not smoking and passed! I was skeptical about the price and wasn’t sure if it would work or not, but thank you SO much and will recommend/buy this again if needed. Totally worth every penny.