system
Given the following post, respond as if you're commenting on Reddit:
human
Are we able to determine the effects a substance would have on a body just by knowing the chemical composition?

For example, if we knew the chemical composition of THC, would we be able to figure out what it would do to our body and how we would feel if no one had ever tried it?
gpt
Not trying to be a smart ass, but, no. This is why drug research exists, because we can't figure it out. We can make guesses. But until we put it in a living being we have no idea. And even then, we still are only making educated guesses based on "generally what happens".