The effect of boron supplementation on lean body mass, plasma testosterone levels, and strength in male bodybuilders

Int J Sport Nutr. 1993 Jun;3(2):140-9. doi: 10.1123/ijsn.3.2.140.


The effect of boron supplementation was investigated in 19 male bodybuilders ages 20-27 years. Ten were given a 2.5-mg boron supplement while 9 were given a placebo every day for 7 weeks. Plasma total and free testosterone, plasma boron, lean body mass, and strength measurements were determined on Days 1 and 49 of the study. Plasma boron values were significantly (p < 0.05) different as the experimental group increased from (+/- SD) 20.1 +/- 7.7 ppb pretest to 32.6 +/- 27.6 ppb posttest, while the control group mean decreased from 15.1 +/- 14.4 ppb pretest to 6.3 +/- 5.5 ppb posttest. Analysis of variance indicated no significant effect of boron supplementation on any of the dependent variables. Both groups demonstrated significant increases in total testosterone, lean body mass, 1-RM squat, and 1-RM bench press. The findings suggest that 7 weeks of bodybuilding can increase total testosterone, lean body mass, and strength in lesser trained bodybuilders, and that boron supplementation had no effect on these measures.

Publication types

  • Clinical Trial
  • Controlled Clinical Trial
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Body Mass Index*
  • Boron / administration & dosage*
  • Boron / blood
  • Diet*
  • Double-Blind Method
  • Humans
  • Male
  • Muscles / physiology*
  • Testosterone / blood*
  • Weight Lifting / physiology*


  • Testosterone
  • Boron