About Authority Nutrition

Authority Nutrition provides daily articles about nutrition, weight loss and health.

Everything we say is based on scientific evidence and written by experts.

We are an unbiased and 100% independent website. We are not sponsored by any industry or company.

We write in plain English to make our articles easy to understand for professionals and laypeople alike.

Every effort is made to be objective, unbiased, honest and to present both sides of the argument.

Every article we publish is the single best article that exists on the topic.

Meet The Team

Authority Nutrition has become incredibly popular since it launched in 2012. It now gets over 15 million visits each month, from all over the world.

Currently there are many licensed nutritionists and dietitians writing articles for the site.


Atli Arnarson Dr. Atli Arnarson

Licensed Nutritionist

PhD in Nutrition

Mary Jane Brown Dr. Mary Jane Brown

Registered Dietitian

PhD in Nutrition

Franziska Spritzler Franziska Spritzler, RD, CDE

Registered Dietitian, Certified Diabetes Educator

Bachelor’s Degree in Nutrition

Joe Leech Joe Leech, MS

Licensed Dietitian

Master’s Degree in Nutrition

Alina Petre Alina Petre, MS, RD

Registered Dietitian

Master’s Degree in Sports Nutrition

Helen West Helen West, RD

Registered Dietitian

Bachelor’s Degree in Nutrition

Adda Bjarnadottir Adda Bjarnadottir, MS

Licensed Nutritionist

Master’s Degree in Nutrition

Matthew Thorpe Dr. Matthew Thorpe, MD, PhD

Medical Doctor

PhD in Nutrition Science

Arlene Semeco Arlene Semeco, MS, RD

Registered Dietitian and Certified Sports Nutritionist

Master’s Degree in Nutrition

Rudy Mawer Rudy Mawer, MSc, CISSN

Certified Sports Nutritionist

Master’s Degree in Exercise and Nutrition Science

Kris Gunnars Kris Gunnars, BSc

CEO and Founder

Bachelor’s Degree in Medicine

other staff

Ragna Oskarsdottir


MBA from the University of Iceland and BEd in mathematics and physics. Worked as a teacher for many years, and was principal at a business school.

Ragna has managed to lose 20 kg (45 lbs) on a real food based diet, and she stays in shape by hiking in the Icelandic mountains, running and working out.

Role: Keeps everything running smoothly.

Aubrey Wood


Chief Editor

Aubrey holds a B.A. in English from Southwest Minnesota State University and a Master of Technical and Professional Communication degree from Auburn University.

She has experience editing for both the scientific community and the general public. Aubrey enjoys outdoor winter sports, horseback riding, and hiking in Iceland with her dog.

Role: Editor.

Christina Guzik



Christina holds a BA from DePauw University and an MBA from Reykjavik University. As a lifelong athlete who is passionate about the power of diet and exercise to change lives, she loves the nature of her work at AN. She stays fit by eating clean and strength training. Out of the office, she loves to experiment in the kitchen, and on the weekends, you’ll find her at her and her husband’s horse farm.

Role: Editing, among other things.

Some Quick Facts

Here are some interesting facts about Authority Nutrition:

  • The site was launched on December 1st, 2012.
  • Authority Nutrition currently gets over 15 million visits per month.
  • We have over 1.1 million fans on Facebook, and over 400,000 email subscribers.
  • Most articles contain dozens of scientific references. The numbers in the parentheses (1, 2, 3) are clickable links to peer-reviewed scientific papers.

Our Policies

We encourage you to read our Privacy Policy and Terms and Conditions of Use.

Contact Us

Your feedback is important to us. If you have any questions, suggestions or tips, please send us an email via the contact form.

This page was last updated on May 30th, 2017.