I was first introduced to the article entitled Observations on the Habilitation of Children with Cortical Visual Impairment as a subscriber to the Journal of Visual Impairment & Blindness (JVIB).
Best Answer: Marijuana remains in your system for about 14 to 30 days. However, hair follicle tests typically detect THC (marijuana) for up to 3 months after you have quit using. Since THC (marijuana) stores itself in your fat cells, exercise -- especially fat-burning exercise like weight training and intense cardio -- can help get it out of your body faster.
So assuming you smoke or vape high CBD cannabis, you'll feel the effects more or less instantly although the full effect will take 10 minutes or so and last for 2 to 3 hours. And edibles will take 30 to 120 minutes usually, depending on what else you eat, and last for 4 to 6 hours.