Kristie Sullivan, PhD

Kristie Sullivan, PhD

Kristie Sullivan is passionate about helping others learn how to follow and sustain a low carb lifestyle. Her passion is fueled by her personal experience with obesity which started in childhood. Kristie began a strict ketogenic lifestyle in 2013. As a result, she has lost over 100 lbs and significantly improved her health.

Because of her personal success, she began helping others who also struggled as she did. Kristie established a popular YouTube channel, Cooking Keto with Kristie. She has also authored three best-selling books, Journey to Health: A Journey Worth Taking, Keto Living Day by Day, and Keto Gatherings. Kristie focuses on a clean-eating approach to a very low-carbohydrate diet.

At Diet Doctor, Kristie focuses on building community among members and supporting them as they adopt a low carb or keto lifestyle. Not only does she respond to member questions and comments, but she also administers a members-only Facebook group for Diet Doctor subscribers. Kristie believes that enjoying low carb foods is a significant factor in long-term success, so she also contributes seasonal recipes to the Diet Doctor website and has two seasons of cooking videos available for members.

Season two of Cooking Keto with Kristie features her in the kitchen with low carb leaders, researchers, and physicians, chatting about various topics and creating . Last, Kristie also contributes to help inspire or motivate those who might also struggle with obesity.

Kristie holds a Ph.D. in Educational Research and Policy Analysis from North Carolina State and enjoyed a 30-year career in higher education before joining Diet Doctor full time. She lives in the beautiful Sandhills region of North Carolina with her husband, David and their two children, Grace and Jonathan. David and Grace also follow a very low carb diet. Kristie also has a Facebook page, Simply Keto, and a closed Facebook group, Low Carb Journey to Health (Cooking Keto with Kristie). She has a website called Cooking Keto With Kristie. You can also find her on TwitterInstagram and Pinterest.

You can contact Kristie at or join her on social media.

Kristie and her family



Kristie’s story

Full video

Kristie’s articles

Too good to keep it to yourself
Finding a way out
Join five guided weeks of keto with Kristie!
Week 5 – Keto for every day
Week 4 – Ensuring long-term success
Week 3 — Common mistakes
Prepare for 5 Weeks of Keto with Kristie
Week 2 — Overcoming obstacles
Week 1 — Keeping the focus on food
5 Weeks of Keto with Kristie — Substitutions
5 Weeks of Keto with Kristie
Recipes from the video course with Kristie
Every day is Mother's Day
What do you want to do when you grow up?
Will there be food you can eat?
What if she was someone I loved
Cooking keto with Nina Teicholz
Holiday gatherings: What will you serve?
Cooking keto with Ivor Cummins
Keto Gatherings: Joy with the carbivores
Cooking keto with Dr. David Diamond
Cooking keto with Dr. Jeffry Gerber
Low-carb and keto stuffing guide with recipes
Cooking keto with Dr. Georgia Ede
The beginning of the end of good intentions
I'm joining the Diet Doctor team full-time!
Too good to be true
A new place to live
Carbs in my pocket
That keto romance
Auld Lang Syne
That diet dilemma and food celebrations
Do you miss bread?
Habits that help
Fight or flight
Puppy love
Slamming on the brakes
'Keto for the Holidays' book review
Finding the fun
How long have you had that shirt?
Sleight of hand
My medicine cabinet
'Keto Restaurant Favorites' review
If wishes were potato chips
Calibrating my gauge
Say cheese! Portrait of an obese mom
"You can't have that"
It's the journey
That girl
Carb trouble
Taking out the garbage
Disrupted by hunger
Ruining the world, one drink at a time
The Vault
My miracle oil
Mastering the waves of ketosis
The sound of silence
How a pumpkin pie spice muffin can mean freedom

Kristie’s recipes

Meet the full team

Team Diet Doctor