I haven't read the story on capsacin and cancer.
However, I do sell Habaneros and caution you after handling them to wash your hands before touching your eyes - or genitals.....
Butter fat (think whole milk or ice cream or a stick of butter) or olive oil will ameliorate the heat of capsacin - on your tongue or in a soup.... In the eyes (think mace), the police force teaches us to just
I have seen a lot of arthritis patients take mega-doses for a (so claimed?) analgesic effect.
While there are a lot of expensive Capsacin supplements out there, these people primarily bought the large bottle of generic cayanne powder and learned to drink it with water.
Here in Texas we mostly just substitute picante sauce for catsup or tomatoe sauce.....