Many factors determine how long THC concentrates stay in your system. We each metabolize THC at a different rate. Additionally, your body composition, your eating habits, the amount you exercise all play into how long THC concentrates stay in your system.
Plus, how frequently you use THC and how much THC you use also determines how long it takes for THC concentrates to leave your system. For example, it may take 10-20 days for heavy users. In contrast, it may take 3 - 7 days for first-time or infrequent users.