Does cranberry break down THC

No. THC is stored in fat cells. Drinking cranberry juice is supposed help clean out your kidney's so that when it comes time for a drug test, the kidney's don't pass traceable amounts of THC to your bladder. There are no sure fire ways to get clean right away. The best way is to stop smoking and exercise.

Breaking down your fat cells by exercising and eating better will eventually eradicate all THC from your body over a long period of time. There have been cases where someone will test clean, start exercising and have a test come back dirty because THC is being released from fat cells being burned off.