Boric acid is the main form of boron in blood, urine, and other body fluids. īoron does not accumulate in most body tissues, but bone, nails, and hair have higher boron levels than other body tissues, whereas fat has lower levels. However, very little is known about how or where in the gastrointestinal tract absorption occurs. The body absorbs about 85%–90% of ingested boron. Most ingested boron is hydrolyzed to boric acid within the gastrointestinal tract. īoron is present in foods and beverages as inorganic borates as well as mono- or di-sugar-borate esters, such as calcium fructoborate. However, it might have beneficial effects on such functions as reproduction and development, calcium metabolism, bone formation, brain function, insulin and energy substrate metabolism, immunity, and the function of steroid hormones (including vitamin D and estrogen). īoron is not classified as an essential nutrient for humans because research has not yet identified a clear biological function for boron. It is a structural component of plant cell walls and is required for plant growth, pollination, and seed formation. Introductionīoron is a trace element that is naturally present in many foods and available as a dietary supplement. For a general overview of Boron, see our consumer fact sheet on Boron. This is a fact sheet intended for health professionals.
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