Terpenes should only be purchased from companies that have properly formulated and tested their products. For the purpose of home production, buy food-grade terpenes for use in edible products, and never inhale pure terpenes. For mixing terpenes, always begin with a very low amount and thoroughly mix with a suitable carrier (oil or distillate). If, during your experimentation, you start to feel an unpleasant level of irritation or anxiety, stop mixing.
