Homebrewers
Making magical brews and elixirs as experiments at home is nothing new - especially after the invention of Magic Containers that makes it possible to store the brews for much longer.
Even with a law in place to prevent untrained citizens from brewing their own potions, many keep doing so anyway. The Institute of Healing is believed to be the main factor for the law to come in place, and for many, it seems obvious that it only helps their business out a lot if there is no competition around. And they are mostly right! The institute has a monopoly on magic potions all across Aewyn.
Small amounts of homebrewing and experiments are not considered illegal, but doing so on larger scales is punishable by law.
The law is called Potion Safety and was voted for mainly because of the dangerous aspects of handling magic wrong can have.
"Did you see Hjeila got a visit from the Potion Security officers this morning? Do you think she's a homebrewer? I would've never guessed."