Known and used by civilizations dating at least back to the time of the Greeks, Boron as borax has a long history. Boron is found naturally in seawater, fruits, and vegetables and is concentrated in some volcanic regions of the world. It was isolated and identified as an element in 1808. Its nutritional value has been debated since 1989. It was finally accepted as an essential nutrient element in 1990 after studies showed that it influenced the metabolism of several other nutrient elements including Calcium, Magnesium, and Phosphorus. Research has confirmed that Boron plays several metabolic roles in animal physiology. Should you experience a Herxheimer reaction, i.e. feeling poorly, reduce the dosing initially. Food High in Boron: Chickpeas, almonds, beans, vegetables, bananas, walnuts, avocado, broccoli, prunes, oranges, red grapes, apples, raisins, pears, and legumes.