I wouldn’t keep it longer than 3 months.

I’ve never juiced cherries before, but you could try (start with a large handful)! I’d just double up on the apple or use celery — something mild that will add a good amount of juice.

You won’t harm yourself by adding the fibers, it’s just thicker and less palatable. If you can drink it that way, go for it!

If you use a blender, you need to strain the liquid to remove the fiber. You could start with a metal strainer to remove the large particles, then use something more tedious like a nut milk bag or a multi-layered cheese cloth if it’s still too thick.

I haven’t seen any research on cancer, but there have definitely been studies on turmeric and ginger that show a significant decrease in inflammation after consumption. If you want to learn more, I suggest doing a search in the nutritionfacts.org archives!