> [Atrial fibrillation] Vitamins D and K, and [[calcium]] are important for stabilizing the heart rhythm. Estrogen tends to cause chemical hyperventilation (loss of carbon dioxide), which increases blood viscosity and the tendency toward atrial fibrillation. [[Progesterone]] and those other steroids have opposite effects ([[progesterone]] is a natural aldosterone antagonist, too). [[thyroid]] is essential for helping cells to retain [[magnesium]]. A quart or two of [[milk]], and a glass or two of orange juice every day helps with the main stabilizing minerals, but it's good to have sea food once a week, especially shell fish, for the trace minerals.