Strength
Boron
Boron is a trace mineral with no established ergogenic benefit from typical pre-workout doses.
How it counts: Not part of the score
We show it on the label and count it as disclosed, but it never affects Dose, any sub-score or the grade. The basis below explains why.
- Clinical dose
- No established clinical dose
- Safety ceiling
- —
- Evidence
- weak
- Category
- Strength
Evidence summary
Research confidence: low
No reference dose: boron has no established requirement and no ergogenic benefit shown in training studies. The hormone result most often cited (Naghii 2011) used 10 mg/day in 8 men; pre-workouts carry about 3 mg, far below the 20 mg/day adult upper limit (NIH ODS).
Research sources
- Boron: Fact Sheet for Health Professionals (NIH Office of Dietary Supplements)(opens in new window)
- Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and proinflammatory cytokines (Naghii et al., J Trace Elem Med Biol 2011)(opens in new window)
8 healthy men, 10 mg/day boron for 1 week: free testosterone up ~28%, estradiol, hs-CRP and IL-6 down; small, unreplicated, no performance outcome