system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Marijuana potency is listed a bunch of ways at dispensaries. What do THC, THCA, CBD and Terpenoid percentages actually mean?

I'm pretty sure I know what the THC does, but really have no idea about the others and how they effect my body.
gpt
THC is the primary psychoactive chemical in cannabis.  It's associate with the "high" feeling.

THCA is a form of THC that is not decarboxylated and cannot be processed by the body.  This is why eating pot doesn't get you high, it needs to be vaporized, incinerated, baked and bound to fat, etc. which converts it into THC.

CBD is cannabidiol, which is associated with relaxation or calming effect on the nervous system.

There are 80 other chemicals that effect the human body in cannabis but these are the main ones.