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Trace Mineral

Calcium Fructoborate

01 / OVERVIEW

What this compound does

WHAT IT DOES

Calcium Fructoborate is a unique form of boron that's bonded to fruit sugar and calcium. It helps your body use calcium better and may calm inflammation in your joints. Some studies suggest it can support strong bones and ease arthritis discomfort. Because it's a newer supplement, we don't know everything about it yet, but it's generally considered safe when taken as directed.

KEY BENEFITS
Supports bone density and strength
Reduces joint pain and stiffness
May lower inflammation throughout the body
Helps your body absorb and use minerals like calcium and magnesium
Supports healthy hormone balance related to bone health
BEST FOR
  • • Adults with mild to moderate knee osteoarthritis
  • • Older adults looking to maintain bone health
  • • People with low boron intake from diet
  • • Active individuals wanting joint support
WHAT TO EXPECT

Most people notice improvements in joint comfort after 2 to 4 weeks of daily use. Effects on bone density may take several months to become measurable.

WHO SHOULD AVOID THIS
  • • Pregnant or breastfeeding women (insufficient safety data)
  • • People with severe kidney disease (boron clearance may be impaired)
  • • Those with estrogen-sensitive conditions (boron may increase estrogen levels)
  • • Children under 18 (lack of studies)
MYTHS & FACTS
Myth: Calcium fructoborate is just a mix of calcium and boron.
Fact: It is a specific complex of boron with calcium and fructose. This form has unique solubility and absorption properties not found in simple mixtures of calcium and boron.
Myth: It provides a significant source of elemental calcium.
Fact: The calcium content per dose is very low (typically ~10-20 mg) and not sufficient for daily calcium needs. Its benefits come from boron and the complex itself.
Myth: Boron supplements are all the same.
Fact: Different boron compounds (like boric acid, sodium borate, and calcium fructoborate) have different absorption rates and biological effects. Calcium fructoborate is better absorbed and may have unique anti-inflammatory benefits.
At a glance
Typical dose
100-200 mg/day (providing approximately 2-4 mg elemental boron)
Loading: 250 mg/day × 7 days for acute inflammatory support
Evidence
—
Studies indexed6
How it's made

Production details below.

03 / DOSAGE

How much, when

MAINTENANCE

100-200 mg/day (providing approximately 2-4 mg elemental boron)

LOADING PROTOCOL

250 mg/day × 7 days for acute inflammatory support

Take with meals for improved tolerability; avoid taking with high-dose calcium or iron within 2 hours

TIMING

Calcium Fructoborate — Any dose

Take with food (Optional, e.g. 'high-fat meal')

02 / EVIDENCE

Peer-reviewed studies

  • PMID: 21870646

    Osteoarthritis pain relief

    In a 4-week RCT of 60 adults with knee osteoarthritis, 300 mg/day calcium fructoborate reduced WOMAC pain scores by 30% compared to placebo.

    B
  • PMID: 23751987

    Bone density support

    A 12-week study in 90 postmenopausal women found that 300 mg/day calcium fructoborate reduced urinary deoxypyridinoline (bone resorption marker) by 20% vs placebo.

    B
  • PMID: 25887157

    Anti-inflammatory effect

    In a pilot human study, supplementation lowered serum IL-6 and TNF-α levels by 15-25% after 8 weeks.

    C
  • PMID: 21267283

    Joint stiffness improvement

    A 2-week open-label trial reported a 40% reduction in morning stiffness in 30 patients with osteoarthritis.

    C
  • PMID: 24679064

    Safety profile

    A 6-month safety study with 100 participants found no adverse effects on kidney or liver function at 300 mg/day.

    B
  • Animal study

    Mineral metabolism

    Animal studies indicate that calcium fructoborate increases serum calcium and magnesium levels, and enhances bone ash content.

    C
  • PMID 36808295 · 2023RCT

    A Comparison of Boron Supplement and Tamsulosin as Medical Expulsive Therapy for Urinary Stones After Extracorporeal Shock Wave Lithotripsy: a Randomized Controlled Clinical Trial

    B
  • PMID 38072490 · 2023RCT

    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

    B
  • PMID 35183882 · 2022RCT

    Possible therapeutic effects of boron citrate and oleoylethanolamide supplementation in patients with COVID-19: A pilot randomized, double-blind, clinical trial

    B
  • PMID 25906949 · 2015RCT

    Effects of boron supplementation on the severity and duration of pain in primary dysmenorrhea

    B
  • PMID 33109244 · 2020RCT

    Assessment of boron-containing compounds and oleoylethanolamide supplementation on the recovery trend in patients with COVID-19: A structured summary of a study protocol for a randomized controlled trial

    B
04 / INTERACTIONS

Medicine interactions

  • Estrogen Replacement Therapy· hormone_therapy

    Boron may increase serum estradiol levels, potentially enhancing effects of estrogen therapy.

    → Monitor hormone levels if used together; consider lower dose.

    MODERATE

  • Loop Diuretics (e.g., Furosemide)· diuretic

    Loop diuretics can increase calcium excretion; calcium fructoborate may counteract this slightly.

    → Monitor electrolyte balance if used concurrently.

    MODERATE

  • Alendronate (Fosamax)· bisphosphonate

    No known direct interaction. Both used for bone health, but mechanism differs.

    → Take at least 1 hour apart to avoid interference with bisphosphonate absorption.

    LOW

  • Corticosteroids (Prednisone)· corticosteroid

    Corticosteroids increase bone loss; calcium fructoborate may help mitigate, but no direct interaction.

    → Useful adjunct; no dose adjustment needed.

    LOW

This page is a reference summary, not a prescription. Consult a clinician before starting, stopping, or combining supplements — especially if you take medication or have a medical condition.