Don't let this study give you a false sense of security. It is 165 pages long and basically it says most will get clean by 30 days of abstinence but there will be cases where it takes longer than 30 days. Every body is different. How do you know which group you will fall in? Trust me you can't tell until you start testing yourself.

In fact the author conducted no new experiments, all he did was read old experiments and give his take on it. Trust me, read the posts here and you will find many who tested positive after 30+ days.

Shitty study.