Hi! Quick history: I donated a kidney in 2007. I m relatively healthy, 29, with the exception of slightly high cholesterol, and maybe a little overweight. I am not diabetic, nor do I have hypertension, but both of those have occured in immediate family members. I m trying to eat better and exercise more for an overall better health. I have thought about starting a dietary supplement aswell. The one I m interested in contains 200 mcg of Chromium Nicotinate. Though I ve only found evidence of the Chromium Picolinate having a negative effect on the kidneys, I wanted to reach out with a doctor to confirm the Nicotinate would be okay to take with one kidney. I would never want to harm it. Thank you!