There are, they are called “landraces”, but you have the problem of replicating the original genetics with a dwindling / deteriorating supply of old seeds. Or if it’s not that, trusting that what you are buying is actually what it advertised.
There's ditchweed everywhere almost. It's been influenced by domesticated varieties but after a couple years a patch will be pretty well back to "landrace" and potency will depend on how much predation and insect load it gets.
Strain called Durban Poison is supposed to be one, relatively common to find in dispensaries. I actually got some yesterday so I know what I am doing Saturday night :)
I can see that being used by sellers as a marketing claim for health benefits in a not so distant future?