hi there, i'm on day 3 now and really struggling with the headaches - I've taken tablets but its still there - how long do these usually last - I'm not sure I can keep this up if these continue much longer!
I'm usually in ketosis by day 4 and the headaches go away then. Some people take until day 5, but I think it is rarely longer than that. Try and drink some more water (hard, I know) but some of the headaches may be down to a touch of dehydration. Keep going - it really is worth it.
Occasionally, during the initial three days a person may experience carbohydrate withdrawal and may develop a headache. This is a temporary effect and should be tolerated. A simple tablet for headaches, for example paracetamol, taken for a day or two will improve the problem. Insufficient fluid intake could also cause a mild dehydration, and ensuing headache. Ensure that the recommended amount of water is drunk.