"All those pills... Don't you want to try something herbal instead? All that chemistry can't be good for you."
"Mum, what do you think photosynthesis is? Magic? It's really amazing chemistry."
"But mixing up stuff in a lab, that's unnatural!"
"Then so would be using a lighter to start a fire, rather than waiting for a lightning strike."
"You don't eat fire, though. Dear, herbal remedies are so much better, because they have less side effects--"
"Yes, mum, opium and cocaine are known for their lack of dangerous side effects, sure. And deadly nightshade is a tasty berry."