Dr. Hotze on Common Causes of Weight Gain Comments: 0 | January 25th, 2016 Dr. Hotze reveals common causes of weight gain and what you can do naturally to achieve weight loss. Written By: STEVEN F. HOTZE, M.D. Steven F. Hotze, M.D., is the founder and CEO of the Hotze Health & Wellness Center, Hotze Vitamins and Physicians Preference Pharmacy International, LLC.