Can someone who is going through any type of surgery still be on Slenderiiz and supplementation? Administrator August 14, 2017 18:30 Follow Yes, except for Magnical-D should not be taken due to the potassium. As always, PLEASE REFER TO YOUR PHYSICIAN. Related articles Slenderiiz FAQs Does birth control affect Slenderiiz results? Can I take Slenderiiz while on chemotherapy? Price Lists Are any sweeteners besides Stevia approved for the Slenderiiz Program? Comments 0 comments Please sign in to leave a comment.