How to Optimize the Circadian Rhythm of Your Fat Cells with Dr. Fiona McCulloch – #345

What Are the Best Times of Day to Eat to Maximize Your Metabolism?

Dr. Fiona McCulloch joins JJ on today’s episode. She is a naturopathic doctor and founder of White Lotus Integrative Medicine in Toronto, Canada. Her book, 8 Steps To Reverse Your PCOS, offers methods for the natural treatment of Polycystic Ovary Syndrome. Dr Fiona and JJ discuss how circadian rhythm affects the fat cells in our bodies. Fat cells produce hormones, break down chemicals and inform the brain on energy stores. When we learn the most efficient time to eat, not only can we optimize our metabolism, but our bodies are also able to function much easier!

Freebies From Today’s Episode

Get Dr. Fiona’s free Food Insulin Demand List by going to

Main Points From Today’s Episode

1. Fat cells are affected by circadian rhythms. They perform very different tasks in the morning than they do at night.

2. Fat cells do more than just store excess weight. They play an important role in many different processes in the body.

3. To adjust our diets to take advantage of the circadian rhythm, Dr. Fiona recommends fasting overnight. Close your kitchen after dinner!

Episode Play-By-Play

[1:13] Discussing fat cells and circadian rhythm

[1:20] When to eat is almost as important as what to eat

[4:13] What is circadian rhythm and why does it matter?

[4:30] Cortisol actually has a higher activity rate at this time of day

[5:50] How does circadian rhythm affect the body’s ability to lose weight?

[7:13] Fat is more than just a type of weight. It plays an important role in hormone function and informing the brain about this.

[7:50] How does circadian rhythm affect fat cells and how they function?

[7:55] Dr Fiona discusses the results of a study done on a group of people.

[8:55] There was a profound difference in what fat cells were doing in the morning and at nighttime.

[10:22] JJ talks about progression of thinking about how often you should eat, what window of time you should eat.

[11:14] How the circadian rhythm ties in with intermittent fasting times

[12:45] Fat cells are just as affected by the times we eat as they are by the food we eat.

[13:30] How many hours before bed should you stop eating?

[14:40] If you’re going to overindulge, what are the best times of day?

[16:30] The best window of time to eat

[17:50] One of the big factors Dr Fiona looks at is insulin resistance. If someone is really struggling, periods of fasting are times when there will be minimal insulin in the body.

[18:50] When you are constantly eating, you interfere with the body’s normal functioning, which requires a fasting state to operate optimally.

[19:40] Dr. Fiona’s free Food Insulin Demand list is a matrix that shows how much insulin is produced when eating a certain food.

Challenge: Close the kitchen 3 hours before bed. Fast for at least 12 hours overnight, a 14-16-hour fast is even better.

Mentioned in this episode:

8 Steps to Reverse Your PCOS

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