As I said, magnesium and potassium deficiencies have been ruled out. My potassium intake is 4.0g+ and magnesium 0.6g-1.0g pending the calcium intake (1:2 Mg:Ca). Also stated in my original post was the fact that I take Borax (sodium tetraborate), a salt of boric acid. Borax is about 11.3% boron by weight, therefore my intake of Boron is over 80 mg per day and has been for over three months.