Zahler BoneFactor™, 120 Tablets supplement bottle
Zahler

BoneFactor™, 120 Tablets

What We Researched
8 active ingredients analyzed · 7 inactive ingredients decoded · 2 brand certifications checked · 4 retailers compared · Last updated: Mar 2026
83
Product Score Good
70
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Magnesium Ascorbate) 120 mg 200%
Vitamin D (as Cholecalciferol) 1000 IU 250%
Vitamin K (as Phytonadione) 30 mcg 38%
Calcium (as Aquamin-F Lithothamnion v) 800 mg 80%
Magnesium (as Magnesium Citrate and Magnesium Aspartate, Magnesium Aquamin-F Lithoamnion Calcareous Marine Algae, Magnesium Ascorbate) 460 mg 115%
Frutex-B® (Calcium Fructoborate) 216 mg *
Strontium (as Strontium Citrate) 100 mg *
Silica (from Bamboo Stern/Leaf Extract) 50 mg *
Bioavailability Very Good

Absorption Rating

  • Vitamin C (as Magnesium Ascorbate) Good
  • Vitamin D (as Cholecalciferol) Good
  • Vitamin K (as Phytonadione) Fair
  • Calcium (as Aquamin-F Lithothamnion v) Good
  • Magnesium (as Magnesium Citrate and Magnesium Aspartate, Magnesium Aquamin-F Lithoamnion Calcareous Marine Algae, Magnesium Ascorbate) Good
  • Frutex-B® (Calcium Fructoborate) Good
  • Strontium (as Strontium Citrate) Good
  • Silica (from Bamboo Stern/Leaf Extract) Fair
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Stearic Acid
  • Dicalcium Phosphate
  • Croscarmellose Sodium
  • Magnesium Stearate
  • Silicon Dioxide
  • Pharmaceutical Glaze (Shellac, Povidone) Low
Efficacy Fair

Dosage Analysis

  • Vitamin C (as Magnesium Ascorbate) 120 mg Effective
  • Vitamin D (as Cholecalciferol) 1000 IU Effective
  • Vitamin K (as Phytonadione) 30 mcg Under-dosed
  • Calcium (as Aquamin-F Lithothamnion v) 800 mg Effective
  • Magnesium (as Magnesium Citrate and Magnesium Aspartate, Magnesium Aquamin-F Lithoamnion Calcareous Marine Algae, Magnesium Ascorbate) 460 mg High
  • Frutex-B® (Calcium Fructoborate) 216 mg Under-dosed
  • Strontium (as Strontium Citrate) 100 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Magnesium Ascorbate) 120 mg 200%
Vitamin D (as Cholecalciferol) 1000 IU 250%
Vitamin K (as Phytonadione) 30 mcg 38%
Calcium (as Aquamin-F Lithothamnion v) 800 mg 80%
Magnesium (as Magnesium Citrate and Magnesium Aspartate, Magnesium Aquamin-F Lithoamnion Calcareous Marine Algae, Magnesium Ascorbate) 460 mg 115%
Frutex-B® (Calcium Fructoborate) 216 mg *
Strontium (as Strontium Citrate) 100 mg *
Silica (from Bamboo Stern/Leaf Extract) 50 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Pharmaceutical Glaze (Shellac, Povidone) Caution

It is used to coat tablets or capsules for easier swallowing and improved shelf life.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$36$35$34$33$32 Mar 12 $33.69
Vitacost

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Zahler

Founded 2005 · Brooklyn, NY, USA · 140 products · zahlers.com/

Certifications

2 certifications
Fda Gmp Inspections Verified Source
Kosher Certified Verified Source

Transparency

3 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source

Violation History

4 incidents
Prop 65 Lead2023-08-28Source
Lawsuit Trademark Infringement2022Source
Prop 65 Lead2021-12-09Source
Fda Warning A retailer was cited for making drug claims about a Zahler product.2017-04-17Source
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Frequently Asked Questions
Is Zahler BoneFactor™, 120 Tablets a good supplement?

Zahler BoneFactor™, 120 Tablets received a product quality score of 83/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 8 active ingredients with 30 servings per container. Of the 7 inactive ingredients, 6 are rated safe and 1 are flagged for review. The manufacturer, Zahler, holds a brand trust score of 70/100 with 2 verified certifications including Fda Gmp Inspections, Kosher Certified.

What are the ingredients in Zahler BoneFactor™, 120 Tablets?

Zahler BoneFactor™, 120 Tablets contains 8 active ingredients: Vitamin C (as Magnesium Ascorbate) (120 mg), Vitamin D (as Cholecalciferol) (1000 IU), Vitamin K (as Phytonadione) (30 mcg), Calcium (as Aquamin-F Lithothamnion v) (800 mg), Magnesium (as Magnesium Citrate and Magnesium Aspartate, Magnesium Aquamin-F Lithoamnion Calcareous Marine Algae, Magnesium Ascorbate) (460 mg), Frutex-B® (Calcium Fructoborate) (216 mg), and 2 more. Notable high-dose ingredients include Vitamin D at 250% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Zahler BoneFactor™, 120 Tablets safe to take?

Zahler BoneFactor™, 120 Tablets has been analyzed for ingredient safety across all its components. Of 7 inactive ingredients, 6 are rated safe. 1 ingredient is flagged for review: Pharmaceutical Glaze (Shellac, Povidone). 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Zahler a trustworthy supplement brand?

Zahler receives a brand trust score of 70/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2005 and headquartered in Brooklyn, NY, USA, the company offers 140 products in their lineup. They hold 2 verified certifications including Fda Gmp Inspections, Kosher Certified. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Zahler has 4 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.