We are dedicated to improving lives through individualized care.

Sarah Duke, RDN, CLT

​Sarah is a Registered Dietitian Nutritionist, Certified L.E.A.P. Therapist and co-founder of Duke Nutrition Experts. She grew up in Decatur, Indiana and earned her degree from Ball State University. She has lived in Tucson, Arizona for the past 9 years and absolutely loves living in the desert!

Sarah has practiced as a dietitian for 18 years. She has worked in many areas of nutrition but her passion lies in helping people find relief from symptoms caused by chronic inflammatory conditions. She takes a functional approach to nutrition and uncovers the root cause of what is causing symptoms.


Sarah is married and has 2 young children that keep her busy. She enjoys anything outdoors, swimming, lifting weights and has earned her blue belt in Brazilian Jiu Jitsu!

Rebecca Watson, MS, RDN, CLT

Rebecca was born and raised in Mesa, AZ. She attended the University of Arizona for her undergraduate degree and completed her Master’s degree in Nutritional Sciences from the University of Saint Joseph Connecticut.


Rebecca works with clients who have a variety of chronic inflammatory medication conditions such as fibromyalgia, RA, migraines, IBS/IBD, diabetes, obesity, and heart disease. She also has a passion for working with those who want to optimize and/or improve their fertility & reproductive health through nutrition.


Rebecca has also worked extensively with high-risk, special needs children. She can assist those with weight management, growth concerns, feeding problems, picky eating habits, multiple food allergies, enteral nutrition support, and digestive concerns.


In her spare time, Rebecca enjoys watching movies, traveling, spending time with her family & friends, and attending the University of Arizona sporting events. Her favorite vacation spots include the beach and Disneyland. She is an animal lover and shares three funny cats, Walle, Eva & Russell, with her husband Matt.  

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Kelly Clarken, RDN, CLT

Kelly was born and raised in Fairfax, Virginia until she was called to the Wildcat family at the University of Arizona for her undergraduate degree. She spent a year in Dallas, Texas to complete her Dietetic Internship at Baylor University Medical Center. She is back in her favorite city, Tucson, where she is a Registered Dietitian Nutritionist.

Kelly has worked with people with various health concerns such as cancer, diabetes, kidney disease, IBS/IBD, and eating disorders. She has a deeply rooted passion for motivating her clients to look at all aspects of health and to have a positive relationship with food.

Kelly spends her time practicing yoga, reading, baking cookies while enjoying an AJ’s iced tea, caring for her plants, and walking Tumamoc Hill. She spends most of her time outside when she can, especially at Starr Pass Resort when her family comes to visit. She misses her sweet Lilly dog back in Virginia but hopes to be a dog mom in the near future.

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Adena Osuna, RDN, CLT

Adena Osuna is native to Tucson, AZ. She worked in human resources for 13 years, however she made the decision to pursue a career as a Registered Dietitian after overcoming her own struggles with chronic symptoms using functional and integrative nutrition. She attended the University of Arizona for her undergraduate degree and completed her dietetic internship at Tucson Medical Center.

Adena has experience working with adult and pediatric populations with diverse health conditions, including but not limited to various gastrointestinal disorders, diabetes, cardiovascular disease, kidney dysfunction, wound therapy, cancer, and weight management. She is in pursuit of becoming a Certified Diabetes Care and Education Specialist and obtaining Certificate of Training in Integrative and Functional Nutrition.


Adena is married with two wonderful daughters. In her free time, she enjoys cooking for family and friends, swimming, and hiking. Two of her favorite hikes are Picacho Peak and Romero Pools.