Is my 16:8 schedule causing late-morning hunger and brain fog, and how to fix?

[Victoria_D]

I've been trying intermittent fasting on a 16:8 schedule for the past three weeks to improve my energy levels and focus during the workday, but I'm struggling with intense hunger and brain fog in the late morning. I usually break my fast at noon with a balanced meal, but the hours from 10 AM onward are becoming really unproductive. I'm wondering if I need to adjust my eating window, change what I'm eating for my last meal at night, or if this is just a normal adaptation phase that will pass. Has anyone else experienced this, and what practical tweaks made the transition smoother for you?