After you fast, when your body releases both insulin and cortisol at the same time, it tells your body to store more fat and stop burning it—like hitting the pause button on fat loss.
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
probability
Can suggest probability/likelihood
Assessment Explanation
The claim describes a biological mechanism involving hormonal interactions that are biologically plausible based on known physiology: insulin promotes fat storage and inhibits lipolysis, while cortisol can enhance adipogenesis in visceral fat under chronic conditions. However, simultaneous elevation post-fast is not a typical physiological state—fasting usually lowers insulin and raises cortisol. The claim assumes a rare or artificial scenario (e.g., refeeding with carbs + stress), so the mechanism is plausible but context-dependent. The use of 'promotes' and 'inhibits' is strong but acceptable if framed as a probable effect under specific conditions. A more precise phrasing would acknowledge the unusual context.
More Accurate Statement
“Under conditions of simultaneous insulin and cortisol elevation following a fast (e.g., refeeding with high-carbohydrate meals under psychological stress), adipogenic signaling is likely enhanced and fat mobilization is likely suppressed, though this scenario is not typical of standard fasting physiology.”
Context Details
Domain
nutrition
Population
human
Subject
Simultaneous elevation of insulin and cortisol post-fast
Action
promotes and inhibits
Target
adipogenic signaling and fat mobilization
Intervention Details
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Evidence from Studies
No evidence studies found yet.