USA Today Bestselling Author | The Weight Health Nutritionist™ | TEDx Speaker | Keynote Speaker & Strategic Consultant | UCI Susan Samueli IFMF Nutrition Course Director

Ashley Koff, RD, is the USA Today bestselling author of Your Best Shot: The Personalized Plan for Optimal Weight Health- GLP-1 Shot or Not (HarperOne), a TEDx speaker, and a pioneering voice in the weight health movement working to make weight health the standard of care across life stages.

With more than 25 years of experience, Ashley challenges conventional approaches to weight loss and nutrition, advancing a personalized approach that considers the body’s composition—including bone, muscle, fat and water—as well as the factors that influence metabolic health. Her work helps individuals, practitioners and organizations move beyond one-size-fits-none recommendations toward more meaningful, personalized health strategies.

A sought-after keynote speaker, educator and strategic consultant, Ashley has worked with organizations including P&G, Westin, Mondelez, Reliance, Blue Cross, YPO and The Cleveland Clinic. She translates complex nutrition science and emerging research into compelling, actionable insights that help audiences rethink conventional approaches to nutrition, weight and health. In her TEDx talk, “GLP-1 Is Not for Weight Loss,” Ashley challenges the reliance on BMI, weight loss and diets as measures and tools for better health, exploring the role of hormones like GLP-1 in the body’s broader systems and what this means for a more personalized approach to weight health. Her work spans personalized nutrition, weight health, GLP-1 medications and the evolving science shaping the future of health.

Most recently, Ashley is bringing her personalized approach to AI, examining how it can enhance personalization and decision-making across nutrition, health and wellness while recognizing where human expertise and judgment remain essential.

Ashley has been recognized as one of CNN’s Top 100 Health Makers and featured in InStyle as “Hollywood’s Leading Dietitian.” She also serves as Nutrition Course Director for the University of California, Irvine’s Susan Samueli Integrative and Functional Medicine Fellowship. Combining scientific expertise, real-world experience and thought leadership, Ashley helps audiences across healthcare, business and wellness understand emerging research and its implications for the future of health.

Through Your Best Shot, The Weight Health Nutritionist™ AI on the Onix app, and her exclusive private practice, Ashley offers different ways to engage with her personalized weight-health approach. She also partners with organizations seeking expert insight, strategic guidance and engaging keynote presentations on the future of nutrition and weight health.

Outside of her work, Ashley seeks adventure in nature, spends time with her dogs and family, and is a passionate basketball fan.