After fasting for 3 days, your body has trouble handling sugar when you eat it again, causing higher blood sugar and insulin spikes.
Scientific Claim
Prolonged fasting (72 hours) impairs glucose tolerance, resulting in higher blood glucose and insulin responses to carbohydrate intake.
Original Statement
“After the 72-hour fast, fat oxidation was higher, as you'd expect. But glucose tolerance got worse. Their blood sugar glucose spiked higher, insulin spiked higher, and glucose oxidation dropped. And this is the body going, I've been running on fat for a few days. I'm not switching gears very easily over here.”
Context Details
Domain
nutrition
Population
human
Subject
prolonged fasting (72 hours)
Action
impairs
Target
glucose tolerance resulting in higher blood glucose and insulin responses
Intervention Details
Evidence from Studies
Supporting (2)
Early Time-Restricted Feeding Improves 24-Hour Glucose Levels and Affects Markers of the Circadian Clock, Aging, and Autophagy in Humans
The cardiovascular, metabolic and hormonal changes accompanying acute starvation in men and women