Jason Karson, BS, CPT, FAS, PPSC

Schedule an appointment directly with Jason Karson by calling or texting 423.364.4008

Jason Karson brings more than 30 years of experience in the fitness and wellness industry to NutritionOS coaching. He holds a Bachelor of Science degree in Nutritional Sciences from the University of Connecticut, with a focus in Sports Medicine, and is a Certified Personal Trainer, Certified Functional Aging Specialist, and Pain-Free Performance Specialist.

Jason is a Certified NutritionOS Coach who coaches clients through the scientifically developed NutritionOS program, originally created by Mike Roussell, PhD, a nationally recognized nutrition expert and author. NutritionOS was designed to take the science of nutrition and turn it into practical strategies people can use in their everyday lives.

The NutritionOS 8-Week Program is a structured weight-loss system designed to help people lose weight while learning the nutrition habits and skills needed to maintain their results. Rather than relying on a restrictive diet or short-term approach, the program teaches clients how to make better food choices, manage portions, understand nutrition, and develop sustainable habits.

As a NutritionOS Coach, Jason’s role is to help clients apply the program to their individual goals, lifestyle, and challenges. Rather than simply handing someone a diet plan, he provides education, guidance, accountability, and coaching to help clients understand how their food choices affect their health and how to make changes they can maintain.

Jason believes nutrition should be simple, practical, and built around real life. His coaching focuses on helping people develop better habits rather than following restrictive diets or searching for quick fixes. He works with clients to improve their nutrition while also addressing exercise, movement, behavior, and lifestyle habits that support long-term weight loss and better health.

Throughout his career, Jason has helped develop nutrition and wellness programs designed to give people the knowledge and tools they need to take greater control of their health. His experience includes creating and implementing NutritionOS at Bradley Wellness Center, where he helped bring nutrition education and coaching together in a practical wellness setting.

Jason’s coaching philosophy is simple: You don’t need a perfect diet. You need a plan that works in your life.

Whether the goal is losing weight, improving energy, supporting strength and fitness, or developing healthier habits for the future, Jason’s goal is to help clients understand the “why” behind their choices and give them practical strategies they can use every day.

With more than three decades of experience in fitness, nutrition, and wellness—and as a Certified NutritionOS Coach—Jason combines the science and structure of the NutritionOS 8-Week Weight-Loss Program with personalized coaching, accountability, and real-world experience to help clients lose weight and build healthier habits that last.

Testimonials

“I joined nutritionOS because I was looking for clear, up-to-date nutrition guidance without being pushed into another ‘plan’ or ‘diet.’ I wanted to continue losing weight while also improving my cholesterol and blood pressure, but I was tired of all the conflicting information out there. What I loved about the program was how manageable it felt. Learning a little each week and then applying it made it easy to stay consistent without feeling overwhelmed. The structure helped me to actually follow through. Working with Jason, my coach, was a great experience. I always felt supported and never judged. The feedback and guidance made a big difference in keeping me on track. I not only lost weight and reached my goals, but I also gained simple, practical strategies for meal planning that I can stick with. It’s no longer complicated—I know how to put together healthy meals without overthinking it. One of my biggest takeaways is how effective the basics are. Focusing on lean proteins, adding fruits and vegetables to each meal, and being mindful about when I include starches has made healthy eating feel straightforward and sustainable. Now, I feel confident about my future health. As long as I follow the core principles, I know I can eat well no matter where I am or what I’m doing. If you’re feeling confused by all the nutrition advice out there and want a simple, science-based approach that actually works long-term, I highly recommend Jason and nutritionOS.”

Janna P

“I joined nutritionOS because I wanted to learn how to eat healthier and lose weight — but what I gained was so much more. The program helped me truly understand what to eat and when to eat it. That clarity made everything feel manageable instead of overwhelming. I lost weight and inches, but more importantly, I feel so much better in my clothes and in my body. Working with Jason was such a positive experience — he was professional, supportive, and really listened to me. My biggest takeaway is knowing which foods support my health and how to structure my meals. I now feel confident making nutritious choices on my own. nutritionOS doesn’t just tell you what to eat — it teaches you how to eat for life.”

Lillie P