No Disease including cancer ,exist in an alkaline environment.
First of all, let’s be clear about this: human blood is in fact “alkaline”. Our blood pH is very (and I mean VERY) tightly regulated to be almost exactly 7.4 (maybe 7.35, but let’s use 7.4 so I don’t have to type more), which is in fact slightly alkaline. There are multiple systems in place to keep our blood pH at or very near this level.
But it is also true that if you make the environment alkaline enough, nothing can survive. You could pour, say, lye (sodium hydroxide, with a pH of about 13), onto tumor cells in a laboratory dish, or bacteria, or yeast, and you would kill them in an instant. But is this a useful therapeutic method? If your blood were infused with sodium hydroxide you would be dead long before it got to a pH of 13. I don’t think experiments have been done to test exactly what blood pH is lethal, but I can assure you it is nowhere near 13. Probably about 7.8.
