Intermittent Fasting After 40: What I Wish Someone Had Told Me
IF works beautifully for some women over 40 and backfires badly for others. The difference comes down to a few details no one talks about.
I jumped on the 16:8 bandwagon at 43. For three weeks I felt amazing. Week four, I crashed — sleep went sideways, my cycle went erratic, and I was hungrier than ever.
What I got wrong
I was fasting too aggressively for my hormonal stage. Women in their 40s often do better with a 12-13 hour window than the strict 16-hour version that works for men.
The protein rule
Whatever your fasting window, your first meal needs 30-40g of protein. Without it, you'll spike and crash and undo every benefit fasting offered.
When to skip it entirely
If you're under chronic stress, sleeping poorly, or in deep perimenopause, intermittent fasting can raise cortisol and worsen the very symptoms you're trying to fix. Listen to your body, not the influencer.