Here's my 2 cents- I drink coffee, and live on. Your headache may be from caffeine withdrawal. Some people can drink it and stay in ketosis, some can't. I never had a headache or felt awful in early Induction,: ketosis kicked in , around 3 days, and I felt great, not hungry, and have ever since. Just my experience. Sometimes I think you get what you expect.


Hang in there- you should feel better soon. Make sure you are drinking lots of water.
Hugs,
Kat