My wife suffered debilitating headaches for 10 years. She went to see several different doctors who suggested various solutions which were of no help. Finally one doctor took her blood pressure which was sky-high. No doctor had done this before. She was put on blood pressure pills which largely stopped the pain but had side effects. Another 10 years of suffering later, that’s 20 years altogether, we tried a low-fat vegan diet. In three weeks blood pressure was gone, pills gone, no headaches ever since. At the same time my health, on the same diet, improved.