How do you manage your reputation when being caught in a brain fog episode while talking to coworkers?

I have to really be on top of my sleep, diet, exercise, and work habits to avoid brain fog. There are times where I inevitably slip and get into brain fog while I'm at work. The dreaded moments are when I need to interact with coworkers and it could be incredibly embarrassing. How do I address these situations? I need to manage my reputation.

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