Women should eat within an hour of waking up to avoid prolonged cortisol elevation, dysregulation of hunger hormones, and uncontrollable cravings at the end of the day.

noli's read

This advice highlights a particular sensitivity of female metabolism to prolonged periods of fasting, particularly in relation to the stress response. It is established by research, such as that published in Nutrients (a systematic review), that women may exhibit a different glycemic and hormonal response to fasting compared to men, with increased cortisol reactivity in some. The idea that fasting can exacerbate sugar cravings at the end of the day in predisposed individuals is consistent with the mechanisms of ghrelin and leptin regulation observed in observational studies. However, presenting this as a universal rule is a simplification, as the impact of intermittent fasting varies enormously according to individual hormonal profile, the menstrual cycle, and physical activity level. While the argument regarding cortisol is physiologically plausible for many active women, there is a lack of large-scale randomized clinical trials (RCTs) that consistently confirm that eating within an hour of waking is superior to a shifted eating window for all women. The discourse remains a useful clinical interpretation, but it tends to generalize a specific physiological response to the entire female population.

the sources

No named source held this one up — that absence is part of the verdict.