Boron: Clinical Evidence & Substantiation Summary
What Is Boron?
Boron is a bioactive trace mineral that impacts the metabolism of other minerals (calcium, magnesium) and the levels of steroid hormones. It is increasingly studied for bone health, joint support, and hormonal optimization.
Mechanism of action: Boron reduces the excretion of calcium and magnesium in urine and increases the half-life of vitamin D and estrogen. It also reduces SHBG (sex hormone-binding globulin) levels, potentially increasing free testosterone. Boron has potent anti-inflammatory effects by reducing CRP.
Clinical Evidence Summary
Below are 3 key clinical studies on Boron. Nutra Comp analyses 18+ studies in its full clinical evidence report.
Boron supplementation and steroid hormones: RCT
Population: 8 healthy men
Key finding: 10 mg boron/day for 1 week significantly reduced CRP (anti-inflammatory) and significantly increased free testosterone by 28% (p<0.05).
Calcium fructoborate and joint comfort: clinical evaluation
Population: 60 adults with knee OA
Key finding: Calcium fructoborate (216 mg/day) significantly improved joint comfort and mobility and reduced inflammatory markers within 14 days (p<0.01).
Boron and bone mineral metabolism: review
Population: Clinical and animal data
Key finding: Boron is a required co-regulator for optimal calcium and vitamin D utilization. Deficiency impairs bone recovery and mineralization.
Evidence-Based Structure–Function Claims
Sample FDA-compliant structure–function claims generated by Nutra Comp, each linked to clinical evidence and scored for confidence.
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Key Terms
Frequently Asked Questions
Is boron FDA approved?
Boron is sold as a dietary supplement. There is no established FDA Daily Value, but the Tolerable Upper Limit is set at 20 mg/day for adults.
Does boron really increase testosterone?
Clinical data shows it can reduce SHBG, which increases the percentage of 'free' (bioactive) testosterone. While significant, it is not a direct hormonal treatment and results vary by individual baseline.
What is the best form?
Calcium fructoborate is a naturally occurring plant form found in fruits and vegetables and has some of the strongest joint-health clinical data. Glycinate is also highly bioavailable.
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