Guy Marshall, RD

4.5
(36)
Video calls
In-person
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Background

As a registered dietitian with a passion for sports, and a desire to help youth athletes build a strong nutritional foundation to enhance their athletic abilities. With experience in addressing the unique dietary needs of athletes, I guide them in making informed choices that support performance, recovery, and overall health. 

I also work with clients from all walks of life, in areas such as general wellness, dietary restrictions, and specific health concerns, taking a holistic approach that considers individual lifestyles. I foster a supportive environment for discussing nutrition journeys.

Outside of my professional life, I’m passionate about sports and wellness. I enjoy staying active and exploring new ways to engage with fitness. My commitment is to inspire healthy eating habits that last a lifetime. Let’s work together to achieve your nutrition goals!

Availability

Approach

"As a dietitian, I adopt a "food first" philosophy, focusing on real, whole foods to help clients build a positive relationship with nutrition. I customize plans based on individual preferences and lifestyles, utilizing evidence-based strategies. Flexibility is important, allowing me to adapt approaches as needed. I emphasize education on nutritional value, promote balance in eating, and celebrate small victories to keep clients motivated. My goal is to make nutrition enjoyable and empowering!"

Specialties

Weight Loss
Diabetes
Eating Disorders & Disordered Eating
Sports Nutrition
General Nutrition

Modalities

🥦
Meal Planning
📊
Accountability
💬
Motivational Interviewing
💞
Relationship With Food
💤
Sleep
🏃
Exercise
🔬
Lab Testing
⚙️
Functional
🔗
Integrative
🌿
Holistic
📏
Personalized Macros

Insurance accepted

Aetna, Cigna, Golden Rule, Optum, Oxford, Select Health, United Healthcare, United Medical Resources (UMR)

Seeing clients in

AZ, CA, CO, HI, MI, NJ, VA

Location

1299 Sweet River Cir, Castle Pines, CO 80108
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Reviews
4.5
36 Reviews
(36)
5
(273)
4
(27)
3
(27)
2
(27)
1
(4)
AI summary of written reviews

Clients consistently describe Jane as warm, knowledgeable, and easy to talk to. Many highlight noticeable improvements in their eating habits, energy, and confidence after just a few weeks of working with her.

While a handful of clients hoped for more structured follow‑up, the vast majority praise her for setting realistic goals and explaining nutrition in a way that finally “clicks.”

Overall, Jane is highly recommended for anyone looking for thoughtful, supportive guidance.

6 clients left publicly written reviews
2 days ago

Jane completely changed how I think about food. She’s patient, knowledgeable, and explains things in a way that actually makes sense.

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