Heidi Moretti, MS, RD, is a Registered Dietitian and Bestselling Author in Medical Nutrition for the book Gut Fix. She also works at Fresenius Medical Care and owns The Healthy RD LLC, a blog and resource for people looking for natural and scientifically proven remedies for health issues. She received post-graduate school training through the Institute for Functional Medicine and is constantly using the National Library of Medicine to uncover natural medicines research. She is also the author of The Whole Body Guide to Gut Health and The Elimination Diet Journal. She has published numerous clinical research studies as the principal investigator for these studies, including:"Vitamin D3 repletion versus placebo as adjunctive treatment of heart failure patient quality of life and hormonal indices: a randomized, double-blind, placebo-controlled trial.""Biotin Deficiency as a target for treating restless legs syndrome in chronic dialysis patients.""Effects of protein supplementation in chronic hemodialysis and peritoneal dialysis patients.""Prevalence of low albumin, suboptimal energy, and muscle stores in Asian dialysis patients." Additionally, she worked for over twenty years at Providence Saint Patrick Hospital in Missoula, where she honed her clinical skills and continued to find ways to add functional medicine into a conventional world.