Well, I knew it would happen. It hit me about 10am yesterday. The dreaded carb withdrawal. Headache, loss of focus/concentration, etc. After trying Atkins that time I remember this. I would complain but I guess I understand it. The human body runs on carbs. Mine runs on more carbs and sugars than most so I knew attempting to reboot the system was going to have some side effects. The good news is that after your body accepts it's new reality, all is well. But you have to force through it.
Today is Day 3 and it does feel a little better so far. Made a point to eat my apple with breakfast to get in that sugar early. Still feel a little "not right." It's an odd feeling to explain. Almost as if you don't want to turn your head very fast.
I did make a mistake during Days 1 & 2 of not having quite enough fruit, so maybe it hit me early.
Let me point out, this is NOT a NO CARB diet. It is just carb restrictive for the first phase of 17 days. After this, many important carbs are added back in slowly.