The honest answer is that the evidence for intermittent fasting specifically in perimenopausal women is limited. Most of the research has been done in younger adults or in men, and results don’t necessarily translate directly to women in hormonal transition.

Some women find it helpful for weight management; others find that long fasting windows make things worse. The concern is cortisol: fasting (especially skipping breakfast) raises cortisol levels, and cortisol is already elevated in many perimenopausal women due to sleep disruption and the hormonal changes themselves. Higher cortisol drives abdominal fat accumulation and can worsen anxiety and sleep — exactly the things many women are already struggling with.

Extended fasting can also cause muscle loss if protein intake isn’t carefully managed, and accelerate fatigue and brain fog.

If you want to try time-restricted eating, a moderate approach tends to work better: eating within a 10–12 hour window (for example, 8am to 6pm or 7am to 7pm) rather than a strict 16:8 protocol is less stressful on the body and more sustainable. The single most important rule: don’t skip protein. Start the day with a protein-rich meal — eggs, paneer, dahi, dal, or a combination — to support satiety, muscle, and stable blood sugar throughout the day.

If you have thyroid issues, blood sugar irregularities, or a history of disordered eating, discuss with your doctor before making any significant changes to your eating pattern.