A nutrition approach completely tailored to you & your biomarkers

Personalized
Nutrition

Digestive
Disorders

Hormone 
Balancing

Gut
Health

LEARN MORE

Specializing in gut health, perimenopause, hormones, digestive disorders, natural GLP-1 enhancement, weight loss, and the mindset necessary for lasting health and habit change, we utilize the principles of FUNCTIONAL MEDICINE and LAB TESTING to dig deeper into your unique health situation to discover the root cause and to create detailed protocols to bring you back into balance. 

We are currently accepting applications for a limited number of private clients. 

Get your body back to how it’s meant to work.  

At Nutritional Zest, we don’t just chase symptoms — we rebuild health from the ground up.

After overcoming my own battles with gut issues, hormone crashes, and burnout, I created The Nutritional Zest Way — a proven system that’s helped hundreds reclaim their energy, restore their gut, and feel alive again.

Because real healing isn’t about trying harder — it’s about working smarter, getting the right support, and finally giving your body what it’s been asking for all along.











We use a combination of stool, saliva urine, blood test, depending on the specific situation a comprehensive blood panel is included in every program where a big believer in the motto test don't guess as it will get you to where you want to be in the most efficient
way possible.

Functional Lab Testing

We'll talk about your health concerns and goals, how NZ is set up and see if we are a good fit to work together

Free Discovery Call 

Initial Consult with Comprehensive Blood Panel

An in depth analysis of your health including a Comprehensive Blood Panel , symptom analysis, food journal review and detailed intake form. You'll learn so much about your health and walk away with action items to put into play
right away. 

Our approach to your health is completely tailored to you & your biomarkers, creating a nutrition, lifestyle and supplement plan to get your body back to doing what it’s meant to do and a process to keep it there — for good. 

Customized Protocol
and Program

Our Approach

Build a body and life you are proud of- vibrant, powerful and fully aligned with who you are becoming. 


  • Stop guessing and start knowing — with powerful functional labs that reveal what others miss
  • Feed your body like it deserves — no more second-guessing, no more settling
  • Heal the gut, rebalance hormones, ignite your metabolism — and finally feel like yourself again
  • Break the cycle of endless diets and quick fixes — and step into real, lasting freedom
  • Reset your energy and resilience by mastering stress, movement, light, and daily rhythms
  • Rewrite your relationship with food — no more guilt, fear, or “starting over” on Monday
  • Build a life and body you’re proud of 

We use LAB TESTING right from the start to take out the guesswork and get you on your way to feeling better immediately.



Features and talks:  

VOTED ONe Of Austin's TOP 3 NUTRITIONISTS

Colleen looked at my symptoms from a different angle and truly was the missing link.

“I have struggled with chronic inflammatory gut issues for years and years. I've been working with a great functional medical doctor in town, but needed more help to really get down to the bottom of what is going on in my body. Colleen looked at my symptoms from a different angle and truly was the missing link. She has guided me on supplementation and a food regime that certainly relieves my symptoms. I feel better than I have in years and I attribute a lot of that to Colleen! I highly recommend Colleen as your Austin nutritionist to help figure out the puzzle for you and truly manage all of your symptoms. She's a delight to work with.”



—

Caroline D., Austin, Texas

Testimonials

working WITH NUTRITIONAL ZEST

"I have been working with Colleen for the past 5 months and it's been amazing. It's not just about weight loss but understanding what is best for my body and foods that trigger stress. I also have been suffering from back pain, and by identifying inflammatory foods my pain has decreased significantly. I cannot say enough wonderful things about my experience with Colleen!"

—
Lauren G., Austin, TX

I think your mind will be blown on what food can do for your body. This has been a life-changing process for me.

"Besides not being bloated anymore, I also feel more energy, clear-headed, and less joint pain. I highly recommend this program for anyone who has thought of changing the way they eat, but doesn't have the self-discipline or time to research to do it themselves. I lost weight and my skin is clearer than ever.  This has been a life-changing process for me. Once again, a whole new level of eating for your optimal health and vitality. Colleen Flynn is the best. She has a no bullsh*t way of educating us."



—

Rico, Austin, Texas

—

Jenny D. 

—

Jenny D., Austin, Texas

“Nutritional Zest is fantastic. I had bariatric surgery in 2015 and lost 180 lbs in a year. I started to slowly put a few pounds on due to being overstressed and generally paying less attention to my health. Colleen listened to me, asked thoughtful questions and designed a plan with my specific needs in mind. Colleen got me back on track and helped me understand how supplements can help. I'm sleeping better, more productive and clear-headed and have an overall sense of calm and happiness. I strongly recommend you work with NZ, they're worth every dime!”



READ MORE ON GOOGLE REVIEWS

the

explore MORE

Check out my latest delicious recipes. 

BLOG

submit

Join our Nutritional Zest community and be the first to know about promotions, events, seminars, new recipes and wellness tips!

We'll be in touch as soon as we can!

THANK-YOU!