system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What are the effects of THC being stored in fat cells for a long time?
gpt
You can fail a screening test for THC is you haven't used in a while but your body recently used the fat in those fat cells for energy, releasing the THC into your blood.  You're not likely to notice, making the test result disappointing.