Nancy Clark, MS, RD, CSSD, renowned author and board-certified specialist in sports dietetics, is known for her ability to translate the science of nutrition for exercise and health into practical tips to enhance performance, manage weight, and resolve eating disorders. She has a private practice in the Boston-area (Newton, MA), where she offers nutrition consultations to both casual exercisers and competitive athletes. Her more renowned clients have included members of the Boston Red Sox, the Boston Celtics, and many collegiate, elite, and Olympic athletes from a variety of sports. She is team nutritionist for the Boston Red Sox.

An internationally known lecturer, Clark has given presentations to professional groups such as the Academy of Nutrition and Dietetics (AND) (formerly known as the American Dietetic Association) and the American College of Sports Medicine (ACSM), as well as team talks to athletes at Boston-area colleges. Clark offers workshops nationally to health professionals with her sports nutrition workshop series. As a part of the Leukemia & Lymphoma Society’s Team in Training Virtual Marathon Training Program, Clark helps novice runners complete the distance.

Clark received her bachelor’s degree in nutrition from Simmons College in Boston and her master’s degree in nutrition from Boston University. She completed her internship in dietetics at Massachusetts General Hospital. She is a fellow of the American Dietetic Association, recipient of its Media Excellence Award, an active member of ADA’s practice group of sports nutritionists (SCAN), and a recipient of that group’s Honor Award. In addition, Clark is a fellow of the ACSM and a recipient of the Honor Award from ACSM’s New England chapter. Clark received the 2015 Nutrition Science Media Award from the American Society of Nutrition.

Clark is the nutrition columnist for New England Runner and American Fitness and is a frequent contributor to numerous sports and fitness publications. She writes a monthly nutrition column called “The Athlete’s Kitchen,” which appears regularly in over 100 sports publications and Web sites. She has authored Nancy Clark’s Food Guide for Marathoners: Tips for Everyday Champions and The Cyclist’s Food Guide: Fueling for the Distance.

She lives in the Boston area.

“[Nancy Clark's Sports Nutrition Guidebook is] the go-to manual for active people to fuel their exercise endeavors… With a focus on sports nutrition, you’re not focused so much on losing, but on gaining. You’re gaining speed, strength and stamina along with mental acuity and improved wellbeing. Yes, it’s also a great recipe for fat loss, but the dropping of excess poundage, again, is a side benefit rather than a primary focus. And that’s what makes it sustainable. Sports nutrition is about the journey rather than the destination. Diet books come and go, but Nancy Clark’s Sports Nutrition Guidebook continues to be the book of choice for those who want to find out what they’re physically capable of… [The book] made all the difference for me. I had done reasonably well in my fitness journey, having lost 30 pounds of fat and gained a fair amount of muscle, but around 2003 was when I really wanted to up my game. I wanted to get faster and stronger and leaner. The director of health and fitness programs at the University of Calgary recommended Nancy’s book to me, and that was the start of changing how I viewed everything to do with food and fueling athletic performance. A decade later I’m a muscular Boston Marathon qualifier who can see his abs. Thanks, Nancy.”

James S. Fell-- Author of Lose It Right: A Brutally Honest 3-Stage Program to Get Fit and Lose Weight Without Losing Your Mind