Why breakfast might affect your stress and heart differently if you're a woman
The Rate of Cortisol Decline After Consuming a High-Fat Test Meal for Breakfast Partially Explained Sex-Dependent Variation in Post Ingestive Cardiovascular Status
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Women’s cortisol dropped dramatically after eating, while men’s stayed relatively high — the opposite of what most assume (that men handle stress better).
People assume men have higher stress hormones, but here, women’s cortisol dropped faster — and that faster drop was linked to worse vascular outcomes, which flips the script on 'stress resilience.'
Practical Takeaways
If you're a woman, monitor how you feel 2–8 hours after a high-fat breakfast — if you feel tense, jittery, or fatigued, try pairing fat with fiber or protein to blunt cortisol spikes.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Women’s cortisol dropped dramatically after eating, while men’s stayed relatively high — the opposite of what most assume (that men handle stress better).
People assume men have higher stress hormones, but here, women’s cortisol dropped faster — and that faster drop was linked to worse vascular outcomes, which flips the script on 'stress resilience.'
Practical Takeaways
If you're a woman, monitor how you feel 2–8 hours after a high-fat breakfast — if you feel tense, jittery, or fatigued, try pairing fat with fiber or protein to blunt cortisol spikes.
Publication
Journal
Current Developments in Nutrition
Year
2026
Authors
K. Laugero, Ryan G. Snodgrass, Nancy L. Keim
Related Content
Claims (6)
When a person skips breakfast or drinks only caffeine, their blood sugar may drop, leading to an increase in cortisol levels as a physiological response.
After eating a high-fat breakfast, people with higher increases in cortisol levels in the hours afterward tend to have lower blood vessel function 8 hours later, as measured by a specific test of blood flow response, even when accounting for other factors like age and sex.
After eating a high-fat breakfast, people with higher cortisol levels in the following 90 minutes tend to show larger increases in heart rate and skin conductance when recalling angry experiences, even when accounting for differences in age, sex, and body weight.
After eating a high-fat breakfast, women show a larger drop in cortisol levels in their saliva over 90 minutes than men, even when accounting for baseline cortisol, age, and body mass index.
In men and women, the way cortisol levels drop after eating is different, and this difference helps explain why men and women also show different responses in blood vessel function and stress-related nervous system activity. When cortisol levels are accounted for in analysis, the gap between sexes in these responses becomes smaller.