Born is an essential trace mineral. Its source in food is dependent on the levels of Boron in the soil but can be found in fruits and vegetables where it is required for cell wall integrity.
Boron is involved in the conversion of vitamin D.
Boron also stabilizes and extends the half life of Vitamin D and oestrogen. - Source www.ncbi.nlm.nih.gov
As oestrogen drops at menopause there is an Increase in certain inflammatory chemicals (a cytokine called interleukin 6 )which stimulates osteoclast production. Boron is required for oestrogen to convert to 17- beta oestrodiol which is more potent than oestrogen, so prolonging the beneficial effects of oestrogen .One study where postmenopausal women were supplemented with 3mg daily Boron, significantly decreased urinary excretory calcium and increased levels of 17-beta-estrodiol.
Boron is also involved in converting Vitamin D to bone building Calcitriol.
Boron also has an interactive rolewith Calcium and magnesium and Vitamin D.
Although there is no RDA for Boron, there are no toxicity reports and 1mg daily intake from food is generally recommended.