A natural high is the result of simply enjoying life, an artificial high is for ppl that cant reach a natural high in their everyday normal life. Ive seen those so called researchers/documentaries etc & they take themselves way too literally as you are also doing.The results that you speak of are only relevant in the form of addicts in which case even gaming can be hazardous to your health, im talking purely in the sense of day to day activity where addicts arent relevant. If ppl simply cant enjoy life without needing artificial stimulants then i find that pretty sad. You sound just like one of those scientists bending/twisting facts to back up your argument when you clearly understand my point but choose to pick bones just for the sake of it. To be more clear.... If you are ingesting alien substances into your system to create a high then i think thats sad.