The Whole View, Episode 453: Should We Eat Breakfast Before 8:30am?
Welcome back to episode 453! (0:28)

Stacy reminds listeners that science is an evolutionary process and, like life, things are constantly changing and growing.

The Whole View has years of shows that may contain outdated science. Both Stacy and Sarah feel it's important to bring some of these episodes back to the forefront and re-examine how science has changed.

So in honor of revisiting some of our favorite shows with the updated science, Sarah decided to start with re-examining the science behind eating (or not eating) breakfast before 8:30am.

See Episode 381: Is Breakfast the Most Important Meal of the Day? for more notes from the last episode!

Updates
Stacy reminds listeners that when you go through long periods of not eating (intermittently fasting), it signals to your body that it's time to rest. This can mess with your circadian rhythm. (58:26) 

Studies link eating breakfast can lower stress levels, help manage mental health, and improve physical health.

Stacy also reminds listeners that coffee doesn't count as breakfast and can actually inflame stomach issues.

You can also spread out breakfast throughout the morning "breakfast" window by eating a series of small things.

Endocrinology Conference: Breakfast Before 8:30am
The study was designed to look at restricted feeding, comparing shorter windows to loger windows. (1:04:20)

Previous studies have found that time-restricted eating, which consolidates eating to a shortened time frame each day, has consistently demonstrated improved metabolic health. 

But research shows that an early time-restricted feeding window is better: 

TPV Podcast Episode 386: Intermittent Fasting 

Intermittent Fasting: Secret to Weight Loss or Dangerous Fad?


Researchers analyzed data from 10,575 adults who participated in the National Health and Nutrition Examination Survey. 

They divided participants into three groups depending on the total duration of food intake: less than 10 hours, 10-13 hours, and more than 13 hours per day. 

Then, they created six subgroups based on eating duration start time (before or after 8:30 am).

They analyzed this data to determine if eating duration and timing were associated with fasting blood sugar levels and estimated insulin resistance. 

Fasting blood sugar levels did not differ significantly among eating interval groups. 

Insulin resistance was higher with shorter eating interval duration but lower across all groups with an eating start time before 8:30am.

What they discovered instead was that eating breakfast early reduced insulin resistance, and feeding window didn't matter.

Is Breakfast the Most Important Meal of the Day?

Is Breakfast The Most Important Meal of the Day? New Science Has Answers!


People who start eating before 8:30 am had lower blood sugar levels and less insulin resistance. This could reduce the risk of developing type 2 diabetes.

Sarah surmises that it makes sense from a cortisol vs. insulin perspective!

Breakfast & Cortisol
Stress, breakfast cereal consumption, and cortisol: recent research has shown that regular breakfast cereal consumption is associated with lower stress levels and reports of better physical and mental health.  

The present study examined this issue using an objective indicator of stress, salivary cortisol. 

Results showed that stress was associated with higher cortisol levels, and daily consumption of breakfast cereal was associated with lower cortisol levels. 

Meal Timing Regulates the Human Circadian System and affects glucose tolerance, substrate oxidation and circadian-related variables: A randomized, crossover trial.

Another study showed female breakfast-skippers display a disrupted cortisol rhythm and elevated blood pressure.

Not to mention, chronic stress is associated with indicators of diet quality in habitual breakfast skippers.

New Science About Breakfast Before 8:30am
Skipping breakfast is also associated with c