The EclecticPhysician

The Eclectic Physician
Vitamin and Mineral Information


The information on this page compiled by
Beth Burch N.D.
(click on the keywords)


Boron appears to to be important in calcium, magnesium and phosphorus absorption and excretion probably by assisting with conversion of vitamin D to its active form. Boron also appears to increase the beneficial effects of estrogen on bones. Boron deficiency is associated with increased loss of calcium and magnesium in the urine and decreased concentration of estrogen and testosterone in the blood.

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  • Boron chelates

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Food Sources

  • Raisins, prunes and almonds are all high in boron. Fruits and vegetables are also good sources.

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  • Recommended Daily Allowance (RDA)
  • There is no RDA for boron.

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Optimal Supplementation

  • 1-3 mg daily

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Treatment of Health Conditions

  • 3-9 mg daily

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Conditions used for

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Side effects

  • Nausea, vomiting and diarrhea at very high doses

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  • Because boron increases estrogen levels, supplementation with boron may be contraindicated in women with cancers that respond to estrogen or in women at risk for these cancers.

Interactions with other nutrients

  • Boron increases the absorption and decreases the excretion of calcium, magnesium and phosphorus.

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Interactions with medications and herbs

  • None known

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1. Newnham RE et al, Essentiality of boron for healthy bones and joints, Environ Health Perspect 1994;102 Suppl 7:83-5
2. Penland JG et al, The importance of boron nutrition for brain and psychological function, Biol Trace Elem Res 1998;66(1-3):299-317
3. Volpe SL et al, The relationship between boron and magnesium status and bone mineral density in the human: a review, Magnes Res 1993;6(3):291-6
4. Nielsen FH et al, Effect of dietary boron on mineral, estrogen, and testosterone metabolism in postmenopausal women, FASEB J 1987;1(5):394-7
5. Nielsen FH, Studies on the relationship between boron and magnesium which possibly affects the formation and maintenance of bones, Magnes Trace Elem 1990;9(2):61-9
6. Benderdour M et al, In vivo and in vitro effects of boron and boronated compounds, J Trace Elem Med Biol 1998;12(1):2-7
7. Meacham SL et al, Effect of boron supplementation on blood and urinary calcium, magnesium, and
phosphorus, and urinary boron in athletic and sedentary women, Am J Clin Nutr 1995;61(2):341-5

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* The information presented in this web site is intended to inform and educate. It is not intended replace a qualified medical practitioner to diagnose or treat medical conditions.

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