Why am I so sensitive to unhealthy foods, such as starches or processed foods?

Two more possibilities are that (1) you may have the genetics 1/3 of the population has, which will be ulatively damaged in the Pancreas by a diet containing bleached wheat flour, as a modified enzyme is created. Back when bleached flour first came out, suddenly juvenile diabetes went from rare to endemic. Researchers tried giving large amounts of this modified enzyme to lab animals, and discovered it would destroy their Pancreas. Quickly it became the established way to study diabetes! The bread industry then and now fears lawsuits, and phony studies were commissioned by charlatans who did studies on humans who ate bleached bread versus those who ate unbleached. HOWEVER, they excluded anyone from the studies whose family had elderly with diabetes, which were the 1/3 at risk from bleached flour. Bleached flour was declared safe, and the bread mffrs were protected from lawsuits. Today, the mffrs would rather poison children than risk being sued for "admitting guilt" by switching to unbleached flour. I personally was showing all kinds of hypoglycemic and diabetic symptoms, INCLUDING HEADACHES, at age 19, when Dr. Nichols told me about all this and put me on an unbleached diet. No more problems, and now I am 61. But if I eat a sandwich a day of bleached flour, in a few days the symptoms return, so I don't do that. I suggest you look into this in your own diet. (2) If some environmental chemical, from whatever source, is giving you a headache, taking 250mg per day of Magnesium Oxide will gently and safely lower your blood pressure a bit, and may make more difference than packing yourself with gesics like time-release acetaminophen, however, there is nothing stopping you from taking both, according to label directions. Good Luck. Regards, Larry.