One of the things that was so cool about this, at least according to the researchers I talked to, was that this increasing concentration of d-limonene didn’t impact the feeling of the high at all. So you got this really targeted effect: basically as you increase concentrations of d-limonene, this particular terpene, you just see people’s anxious reactions go down, but they aren’t reporting feeling that their high is any less or different. It’s mostly just the anxiety.

— Read more in A Citrus-Scented Cannabis Compound Reduces Anxiety for Weed Users at Scientific American.