Stevia and Xylitol seem much less disruptive to your gut than sucralose or saccharin, but I'm not an expert.

Even a world-class nutritionist can't tell you what their effect on you will be with certainty. The only way to be sure is to cut them out of your diet for 6 weeks or so and see what happens.

Everything bad, eat what makes you happy, we get cancer one way or the other