NutriStack
InfoSynergy
Vitamin D3
Boron supports vitamin D metabolism and may increase the half-life of 25(OH)D in the body.
Recommendation: 3-6mg boron may enhance vitamin D status, particularly when D levels are suboptimal.
Boron
Mineral ·Emerging evidence ·Reviewed May 2026
Trace mineral studied for bone-mineral, vitamin D, magnesium, and selected hormone-marker contexts.
The bottom line
Evidence rating emerging. Most-documented uses: bone-mineral support, vitamin d metabolism research, hormone-marker research. 16 sources indexed (1987–2025), with 7 interaction records on file.
The science
How it works, mechanistically.
Core mechanism
May influence mineral metabolism, vitamin D hydroxylation, cell-membrane biology, and steroid-hormone markers in small or context-specific studies; effects are not reliable testosterone claims.6,8
Class
Trace Mineral
Found in food
Raisins, Almonds, Avocado
Low-status signs
Not applicable
Absorption
Water-soluble; take with food
Dosing
Dosing & protocol.
Common range
3–6 mg daily
Recommended form
Boron citrate or boron glycinate
Very well absorbed; enhances magnesium retention2,3
Dosing protocol
Maintain · 3-10 mg/day
Higher doses (above 20 mg/day) are not advised. Take with food.
No cycling requiredNo tolerance buildup
Forms
Forms & what to buy.
Ranked by evidence and value.
Boron Glycinate Recommended
Rank 1: chelated form with good tolerability. Limited direct form-comparison evidence; ranking is based on review or mechanistic data (PMID: 41463367). Dose by elemental boron.
Boron Citrate
Rank 2: common economical organic salt. Often combined with minerals.
Boric Acid
Rank 3: highly absorbable inorganic form but less supplement-friendly. Avoid high doses due to toxicity risk.
Cost
What it actually costs.
Real-world pricing across three quality tiers. Assumes Boron Citrate / Glycinate.
BudgetBest value
$0.90 /mo
$0.03 per dose
Mid
$2.10 /mo
$0.07 per dose
Premium
$4.50 /mo
$0.15 per dose
Assumes 3-6 mg/day. Vendor basis: NOW/iHerb, Vitacost, Life Extension, and Amazon marketplace; boron is inexpensive except in mineral complexes. Updated 2026-05-28.
From food
The same dose, as food.
How much you'd eat to match a supplemental dose.
3-6 mg boron
About 1/2 cup raisins plus 1 ounce almonds, 1 avocado plus 1/2 cup prunes, 2 ounces peanuts plus fruit, 1 cup cooked beans, or a prune-raisin-almond serving can reach this range.
Boron content varies with soil and growing region.
Goals
Goal-based dosing.
Lab work
Markers to track.
What to test, the optimal window inside the conventional range, and how long a response takes.
Serum Boron B (boron)
Boron supplementation (3 to 10 mg per day) raises serum boron and has been studied for effects on free testosterone and SHBG.6,1
Optimal
60–150 ng/mL
Conventional
20–200 ng/mL
Responds in
Serum boron rises within days; downstream hormonal markers shift over 1 to 2 weeks.
20optimal200
Specialty lab only. Routine testing is uncommon. Consider free testosterone and SHBG as functional secondary markers.
Free TestosteroneSHBG
SHBG
Boron typically produces a modest, dose-dependent reduction in SHBG that is clearest when baseline SHBG is elevated, so changes are often small and may not occur if SHBG is already low.1,2
Optimal
15–35 nmol/L
Conventional
10–57 nmol/L
Responds in
8 to 12 weeks
10optimal57
Draw in the morning when possible and keep timing consistent between baseline and retest, since SHBG tracks alongside sex hormones. Compare against the same lab and assay, and retest after about 8 weeks of consistent supplementation.
Free TestosteroneTotal TestosteroneEstradiolAlbumin
Free Testosterone Free T
Boron tends to produce a modest, dose-dependent increase in free testosterone, largely secondary to lowered SHBG, and the effect is clearest when baseline free testosterone is low.5,6
Optimal
150–244 pg/mL
Conventional
47–244 pg/mL
Responds in
8 to 12 weeks
47optimal244
Collect a morning sample (testosterone peaks early in the day) and use the same assay each time, as calculated and direct free-testosterone methods differ. Pair with SHBG and total testosterone for interpretation, and avoid testing during acute illness or right after intense exercise.
SHBGTotal TestosteroneEstradiol
Why people use it
Symptoms it's matched to.
Where this appears in the symptom-to-supplement map, ranked by relevance.
Frequent stress fractures / bone stress
55% relevance
Boron may influence calcium, magnesium, and vitamin D metabolism and sex hormone balance, which could indirectly support bone, though human bone outcomes are unclear.8,9
BoneInsufficient evidenceBoron, 3 mg daily
Minor adjunct with limited direct fracture evidence; recurrent stress fractures should always be evaluated by a physician.
Low testosterone
54% relevance
Boron is used in hormone-support stacks because of effects on vitamin D handling and free hormone fractions.5,6
HormoneEmerging evidenceBoron citrate or glycinate
Use conservative doses.
Bone density concerns
51% relevance
Boron is used in bone-support stacks because of effects on mineral and vitamin D handling.8,9
BoneEmerging evidenceBoron glycinate
A supportive trace mineral rather than a stand-alone intervention.
Bone fracture history
50% relevance
Boron supports bone mineral metabolism and reduces urinary calcium loss.8,13
BoneEmerging evidenceBoron, 3 to 10 mg per day
Trace mineral; modest effect.
Andropause / age-related male hormonal decline
50% relevance
Boron can lower sex-hormone-binding globulin and shift the free-to-total testosterone ratio and reduce inflammatory markers in short studies.
HormoneEmerging evidence3 to 6 mg daily
Evidence rests on small, short-duration studies; effects on actual symptoms are unproven. Keep within this dose range.
Protocols
Featured in protocols.
Evidence-based stacks that include it, with the exact dose and timing each one uses.
Hormonal Balance Protocol
Hormonal BalanceOptionalEmerging evidenceIntermediate$30-50/mo
Dose here
6 mg
Timing
Morning
Trace mineral studied for vitamin D and steroid-hormone markers in small studies; evidence remains emerging.6,4
Men's Hormonal Support Protocol
Hormonal BalanceOptionalEmerging evidenceIntermediate$45-75/mo
Dose here
3-6 mg/day
Timing
Once daily with a meal
Small short-term studies suggest boron may lower sex hormone binding globulin and reduce some inflammatory markers, which could modestly raise free testosterone, but the evidence base is limited and preliminary. It is included as a low-dose adjunct rather than a primary driver, and intake should stay well below the tolerable upper limit of about 20 mg/day.5,6
Bone Density Support Protocol
Bone HealthOptionalEmerging evidenceIntermediate$30-50/mo
Dose here
3 mg daily
Timing
With any meal
Boron is a trace mineral that appears to influence the metabolism of calcium, magnesium, and vitamin D and may modestly affect steroid hormones relevant to bone. Human bone outcome data are limited, so it is included as an emerging adjunct.4,10
Menopause Support Protocol
Hormonal BalanceOptionalEmerging evidenceBeginner$35-55/mo
Dose here
3 mg daily
Timing
With any meal
Boron is a trace mineral that influences the metabolism of calcium, magnesium, and vitamin D and may modestly affect circulating steroid hormone levels. Its role in human bone health is supportive and still being characterized, so it is best kept at low, conservative doses.4,6
Safety
Full safety detail.
Interactions
Interaction records.
InfoSynergy
Calcium
Boron reduces urinary calcium excretion and supports calcium utilization for bone health.
Recommendation: 3mg boron daily may help retain calcium and support bone mineral density.
InfoSynergy
Magnesium Glycinate
Boron has been shown to reduce urinary magnesium loss and raise serum magnesium, supporting magnesium status when the two are taken together.
Recommendation: Reasonable to take together, particularly for bone and mineral support in postmenopausal women. No timing separation is needed.
InfoSynergy
Tribulus Terrestris
Boron can raise free testosterone by lowering sex hormone binding globulin and reducing conversion of testosterone to estradiol, a mechanism that complements Tribulus rather than overlapping with it.
Recommendation: Boron 3 to 6mg daily can be paired with Tribulus for free testosterone support. Stay within the boron tolerable upper intake level of 20mg daily and do not megadose.
InfoSynergy
Silicon
Both silicon and boron are ultratrace elements repeatedly linked to bone and connective tissue integrity, and they are commonly co-formulated for skeletal support. Mechanistically they are additive: silicon contributes to collagen cross-linking and matrix formation, whereas boron improves the metabolic handling of calcium, magnesium, and Vitamin D that supports mineralization. The combination is mechanistically coherent and biologically plausible, though direct head-to-head human trials of the specific pair are limited and most evidence is observational or based on each element individually.
Recommendation: Can be taken together for bone, joint, and connective tissue support. Typical doses: silicon around 5 to 10 mg elemental per day and boron around 3 mg per day (generally keeping boron at or below 3 to 6 mg per day for routine use). No timing separation is needed; both are well tolerated with food. Do not exceed the boron tolerable upper limit of about 20 mg per day.
ModerateCaution
DHEA
Both boron and DHEA can independently raise circulating androgen and estrogen levels. Boron tends to increase free testosterone and estradiol (in part by lowering SHBG), while DHEA serves as a direct precursor that the body converts into those same hormones. Stacking them can produce a larger combined rise in sex hormones than either alone, which is desirable for some users but can also amplify estrogen-related or androgen-related side effects.
Recommendation: If stacking, start DHEA at the lowest effective dose (commonly 10 to 25 mg/day) rather than higher doses, and keep boron in the typical supplemental range (around 3 to 10 mg/day). Consider monitoring testosterone, estradiol, and SHBG if using both for more than a few weeks, especially in hormone-sensitive individuals. Women, anyone with a history of hormone-sensitive conditions (breast, ovarian, uterine, or prostate concerns), and those on hormone therapy should consult a clinician before combining. There is no need to separate the doses by time; the consideration is cumulative hormonal effect, not absorption.
InfoCaution
Testosterone
In a small trial, daily boron 10 mg raised free testosterone and modestly lowered estradiol in healthy men over one week. The clinical impact on top of prescribed testosterone is likely small but may shift the androgen-to-estrogen ratio and complicate monitoring.
Recommendation: Routine boron supplementation is generally safe at 3-10 mg/day, but is not needed alongside prescribed testosterone. If used, keep the dose modest (3 mg/day from a multivitamin is fine) and discuss with your prescriber.
Sources
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Meta-analyses & systematic reviews
1- 1Boron compound administration; A novel agent in weight management: A systematic review and meta-analysis of animal studiesSource linkedPMIDDoaei S, Gholami S, Khajeh M et al. · J Trace Elem Med Biol · 2022
Randomized controlled trials
5- 2The Effect of Boron Supplementation on Kidney Stones in Patients With Nephrolithiasis: A Double-Blind Randomized Controlled TrialNeeds reviewPMIDVousoughi G, Soleimanzadeh H, Radkhah N et al. · Food science & nutrition · 2025
Vousoughi G, Soleimanzadeh H, Radkhah N et al.. The Effect of Boron Supplementation on Kidney Stones in Patients With Nephrolithiasis: A Double-Blind Randomized Controlled Trial. Food science & nutrition. 2025
- 3Effects of boron citrate supplementation on cardiometabolic factors, inflammatory biomarkers and anthropometric measures in obese patients: study protocol for a randomised, double-blind clinical trialNeeds reviewPMIDNaemi M, Naghshi S, Rostami S et al. · BMJ open · 2023
Naemi M, Naghshi S, Rostami S et al.. Effects of boron citrate supplementation on cardiometabolic factors, inflammatory biomarkers and anthropometric measures in obese patients: study protocol for a randomised, double-blind clinical trial. BMJ open. 2023
- 4Possible therapeutic effects of boron citrate and oleoylethanolamide supplementation in patients with COVID-19: A pilot randomized, double-blind, clinical trialNeeds reviewPMIDAkbari N, Ostadrahimi A, Tutunchi H et al. · Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) · 2022
Akbari N, Ostadrahimi A, Tutunchi H et al.. Possible therapeutic effects of boron citrate and oleoylethanolamide supplementation in patients with COVID-19: A pilot randomized, double-blind, clinical trial. Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS). 2022
- 5Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and proinflammatory cytokinesNeeds reviewPMIDNaghii MR et al. · J Trace Elem Med Biol · 2011
Small/context-specific studies reported changes in hormone markers; do not present boron as a reliable testosterone-increasing supplement.
- 6Effect of dietary boron on mineral, estrogen, and testosterone metabolism in postmenopausal womenNeeds reviewPMIDNielsen FH et al. · FASEB J · 1987
Small/context-specific studies reported changes in hormone markers; do not present boron as a reliable testosterone-increasing supplement.
Reviews & position papers
9- 7Moderate dietary boron supplementation improved growth performance, crude protein digestibility and diarrhea index in weaner pigs regardless of the sanitary conditionNeeds reviewPMIDCho HM, Macelline SP, Wickramasuriya SS et al. · Animal bioscience · 2022
Cho HM, Macelline SP, Wickramasuriya SS et al.. Moderate dietary boron supplementation improved growth performance, crude protein digestibility and diarrhea index in weaner pigs regardless of the sanitary condition. Animal bioscience. 2022
- 8Nutrition, Physical Activity, and Dietary Supplementation to Prevent Bone Mineral Density Loss: A Food PyramidNeeds reviewPMIDRondanelli M, Faliva MA, Barrile GC et al. · Nutrients · 2021
Review recommends that when daily requirements cannot be satisfied through diet, calcium, vitamin D, boron, omega 3, and isoflavones supplementation could be an effective strategy for osteopenia/osteoporosis patients with a great benefit/cost ratio.
- 9Pivotal role of boron supplementation on bone health: A narrative reviewNeeds reviewPMIDPizzorno L · J Trace Elem Med Biol · 2020
Small/context-specific studies reported changes in hormone markers; do not present boron as a reliable testosterone-increasing supplement.
- 10The Role of Mineral and Trace Element Supplementation in Exercise and Athletic Performance: A Systematic ReviewNeeds reviewPMIDHeffernan SM, Horner K, De Vito G, Conway GE · Nutrients · 2019
Only 4 studies on boron supplementation and exercise were identified. Currently there is little evidence to support boron supplementation for improving physiological markers of athletic performance. More high quality research is required.
- 11Influence of boron supplementation on performance, immunity and antioxidant status of lambs fed diets with or without adequate level of calciumNeeds reviewPMIDBhasker TV, Gowda NKS, Pal DT et al. · PloS one · 2017
Bhasker TV, Gowda NKS, Pal DT et al.. Influence of boron supplementation on performance, immunity and antioxidant status of lambs fed diets with or without adequate level of calcium. PloS one. 2017
- 12Nothing Boring About BoronNeeds reviewPMIDPizzorno L · Integr Med (Encinitas) · 2015
Small/context-specific studies reported changes in hormone markers; do not present boron as a reliable testosterone-increasing supplement.
- 13Effects of Dietary Cadmium and Boron Supplementation on Performance, Eggshell Quality and Mineral Concentrations of Bone in Laying HensNeeds reviewPMIDOlgun O, Bahtiyarca Y · Biological trace element research · 2015
Olgun O, Bahtiyarca Y. Effects of Dietary Cadmium and Boron Supplementation on Performance, Eggshell Quality and Mineral Concentrations of Bone in Laying Hens. Biological trace element research. 2015
- 14Up-regulatory impact of boron on vitamin D function -- does it reflect inhibition of 24-hydroxylase?Needs reviewPMIDMiljkovic D et al. · Med Hypotheses · 2004
Boron may potentiate vitamin D protection through inhibition of microsomal enzymes that catabolize 25-hydroxyvitamin D
- 15Essentiality of boron for healthy bones and jointsNeeds reviewPMIDNewnham RE · Environ Health Perspect · 1994
50% of subjects on 6 mg boron/day improved vs 10% on placebo; arthritis incidence 0-10% in high boron areas vs 20-70% in low boron areas
Keep exploring
Deep dives & adjacent profiles.
This page is educational. Do not start, stop, or change a supplement or medication based on it without checking with a qualified healthcare professional.
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