Effects of boron supplementation on bone mineral density and dietary, blood, and urinary calcium, phosphorus, magnesium, and boron in female athletes

Environ Health Perspect. 1994 Nov;102 Suppl 7(Suppl 7):79-82. doi: 10.1289/ehp.94102s779.


The effects of boron supplementation on blood and urinary minerals were studied in female college students--17 athletes and 11 sedentary controls--over a one-year period. The athletes had lower percent body fat and higher aerobic capacities than sedentary controls. Athletic subjects consumed more boron in their normal diets than sedentary subjects; all other dietary measures were similar between the two groups. The athletes showed a slight increase in bone mineral density, whereas the sedentary group showed a slight decrease. Serum phosphorus concentrations were lower in boron-supplemented subjects than in subjects receiving placebos, and were lower at the end of the study period than during baseline analysis. Activity depressed changes in serum phosphorus in boron-supplemented subjects. Serum magnesium concentrations were greatest in the sedentary controls whose diets were supplemented with boron, and increased with time in all subjects. A group x supplement interaction was observed with serum magnesium; exercise in boron-supplemented subjects lowered serum magnesium. In all subjects, calcium excretion increased over time; in boron-supplemented subjects, boron excretion increased over time. In all subjects, boron supplementation affected serum phosphorus and magnesium, and the excretion of urinary boron.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial

MeSH terms

  • Adult
  • Bone Density / drug effects*
  • Bone Density / physiology
  • Boron / administration & dosage*
  • Boron / blood
  • Calcium / blood
  • Female
  • Humans
  • Magnesium / blood
  • Nutritional Requirements
  • Phosphorus / blood
  • Single-Blind Method
  • Sports* / physiology
  • Trace Elements / blood*


  • Trace Elements
  • Phosphorus
  • Magnesium
  • Boron
  • Calcium