Kicked out of ketosis by one cheat meal — how to get back fast?

Recovery protocol — fastest way back:

Day of/morning after: Don't try to "make up for it" by eating nothing — that adds stress to recovery. Eat normal keto meals (eggs and bacon breakfast, fatty meat for dinner).

Fastest method: 24-36 hour fast starting the morning after. Drink water, black coffee, electrolytes. Fasting depletes glycogen stores faster than eating even strict keto. Most fat-adapted people can be back in ketosis in 24-36 hours versus 48-72 hours of just eating keto food.

Add exercise: A 30-45 minute walk the morning after burns glycogen directly. Light cardio, not intense.

Extra hydration: 3-4 liters of water with electrolytes. The carb refeed causes water retention — flushing it speeds the physical recovery.

Most fat-adapted people are back in ketosis in 1-3 days. Non-adapted people may take 3-5 days. You're at 4 weeks, so the adapted timeline applies.

The physical feeling awful is partly mental and partly real blood sugar fluctuation after weeks of stable ketosis. The mental part: forgive yourself immediately. One meal is one meal — it doesn't define your commitment or erase your progress. The physical part passes within 24 hours as your blood sugar restabilizes.

Also: don't weigh yourself for 3 days after a carb refeed. The water weight from stored glycogen will look like 3-5 lbs of weight gain. It's not fat. It will drop within 3-4 days. Seeing that number on the scale before it drops will psychologically mess you up unnecessarily.