Answer to question one from my own research:
Well, there are over 500 species of aloe. It's true that Aloe Vera has medicinal properties, but there are other Aloe species, many which grow in South Africa, that also have medicinal properties.
https://en.wikipedia.org/wiki/...
https://www.ncbi.nlm.nih.gov/p...
In reality, these aloe species are rarer, and you may never come across them.
Question three:
Aloe Vera juice (the real thing), soothed my stomach when I had GERD. A lot of things have no "scientific proof", yet they do help. Whether they really are carcinogenic, I have no clue!
