.My guess is that the headache is probably related to OP. People who took the OP survey mostly said they didn't experience side effects from OP. I did have apparent side effects myself. The first night I had a bad tooth ache in the upper right quadrant, the 2nd night in the upper left quadrant and the 3rd or 4th night a bad headache. I had longstanding tooth infections and every few months got toothaches anyway before I started OP, as well as about weekly headaches in back of the upper neck. After the first 3 or 4 nights of pain with starting OP, that was it for 2 months. Gum tenderness and bleeding stopped right away and my infections were all vanishing. A few days ago a toothache in the lower right quadrant occurred and a couple bad headaches after that. I'm pretty sure it's part of the detox. The area of the toothache feels good now, no soreness at all. Headaches are gone too.
.I helped my toothaches with sliced raw garlic and my headaches with dried rosemary, a teaspoon or more at a time - I blend it with bananas and some water. Fresh rosemary would probably be better. I ordered a plant, but it hasn't yet arrived. They can be grown easily indoors supposedly, as well as out, and apparently they're easy to start from cuttings etc. I think the OP is removing the cause of my headaches, that being systemic infection due to the hidden tooth infections.