A 18-year-old male asked:
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i workout 4 times a week, drinking a gallon of water and taking niacin with workout. i used to smoke 2 time a week. how long till weed out of blood?

1 doctor answer
Dr. Rick Koch
Dr. Rick Koch answered
21 years experience Cardiology
For chronic users: About 30 days for urinary detection...Please don't use marihuana unless medically prescribed.
Answered on May 15, 2018

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