My guess it is hyperfocus related. Which, looking through a few sites seems: not ADHD specific, might be found in a higher rate in people with ADHD, hasn't been researched thoroughly.

[–] Scubus@sh.itjust.works 7 points 1 month ago

Dont worry bro, caveman me has the good shit. First two are free, after that its three uunga bungas per

[–] Aksamit@slrpnk.net 1 points 1 month ago* (last edited 1 month ago)

Depending on where in the world your cave was, you could well have had access to ephedra plants.

Ephedra pollen was found in a 50,000 year old neanderthal grave in Kurdistan, and the plant grows in many other places all over the world too.

Ephedra plants are what the stimulant ephedrine is derived from, and drinking a tea brewed from the plant will have a stimulant effect and I'm pretty sure making an extra strong ephedra tea would have a stronger effect.

Also apparently Mormons drink a lot of it.