The headache is usually from what we refer to as the low carb flu which hits people at different times. By the third week it is gone in most people. I had it from around days 3 and 4.
I've heard different theories of what causes it but the most plausible to me are the following two. It may be due to rapid shifts of water out of cells into the blood stream and filtered out through the kidneys because the typical large initial weight loss in the first 2 weeks is attributed to this shift in fluids. It's temporary and is relieved by drinking plenty of fluids. It is also attributed to the change from burning large amounts of easily digested carbs for energy from grains, starches, etc to turning fat into glucose to burn. Your glycogen stores are being used up and not replaced. This is helped by being sure you have adequate fat to burn. Everything is changing including your blood pressure, blood sugar, electrolytes, etc. If you are on blood pressure medicine or diabetic medicine you will have to monitor these things closely. Be sure you get your low glycemic veggies in and your beans if you are on a plan that allows them because they will also help.
It's possible to have palpitations due to these changes but there are two other chief reasons for heart palpitations. You are not eating enough calories so stress hormones have been released which can cause palpitations. I also find that many palpitations are caused by changes in caffeine use.
-American consumers have no problem with carcinogens, but they will not purchase any product, including floor wax, that has fat in it. - Dave Barry
-My doctor told me to stop having intimate dinners for four; unless there are three other people. - Orson Welles
-The food here is terrible, and the portions are too small. - Woody Allen
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|74 Days since: sitting on my butt for long periods of time