Whey Protein and Food Sensitivities

I used to have intestinal dysbiosis and still suffer from certain food sensitivities. I have difficulty handling whey protein, so I’m trying to find a very pure brand with no added artificial ingredients (sucralose, aspartime etc).

I have narrowed it down to Jay Robb’s Whey Isolate (unflavored), Now Food’s Whey Isolate (unflavored) and Energy First’s ProEnergy Whey Isolate.

If anyone has had any experience with these brands, I would appreciate the feedback.

Thanks