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Boron is a nonmetallic element discovered in 1810 and first isolated in its pure form in the late 1800s. Found only in trace amounts in the human body, boron was generally viewed as a nonessential mineral; however, research conducted over the last twenty years suggests that boron may play important roles in mineral metabolism, hormone synthesis, and brain function. Supplemental forms of boron include boron chelates (such as boron citrate, aspartate, and glycinate), sodium borate, and sodium tetraborate decahydrate.
The optimum daily intake for boron has not been determined. Normal boron intake from foods varies widely from region to region, with estimated intakes ranging from 0.3 to 41 mg per day. The average dietary boron intake for Americans is estimated to be 1.02 mg/day for men and 0.96 mg/day for women. Studies on boron supplements have used doses of 3 to 6 mg per day, and this dosage range appears to be safe for most people.