Nature's Way OsteoPrime Plus Calcium & Magnesium, 120 Tablets supplement bottle
Nature's Way

OsteoPrime Plus Calcium & Magnesium, 120 Tablets

What We Researched
25 active ingredients analyzed · 6 inactive ingredients decoded · 5 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
89
Product Score Good
95
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (Ascorbic Acid) 120 mg 133%
Vitamin D3 (As Cholecalciferol) 20 mcg 100%
Vitamin K1 (As Phytonadione) 300 mcg 250%
Thiamin (as thiamine HCl) 20 mg 1667%
Riboflavin (As Vitamin B2, Riboflavin-5'-Phosphate) 20 mg 1538%
Niacin (As Niacinamide) 50 mg 313%
Vitamin B6 (As Pyridoxine HCl, Pyridoxal-5'-Phosphate) 20 mg 1176%
Folate (420 Mcg Folic Acid) (104 Mcg Quatrefolic® Brand (6S)-5-Methyltetrahydrofolate Glucosamine Salt) 800 mcg 200%
Vitamin B12 (As Cyanocobalamin, Methylcobalamin) 50 mcg 2083%
Pantothenic Acid (As Calcium D-Pantothenate) 20 mg 400%
Calcium (As Calcium Carbonate, tribasic calcium phosphate, calcium lactate, calcium Krebs cycle complex‡, calcium citrate) 800 mg 62%
Phosphorus (As Tricalcium calcium Phosphate) 128 mg 10%
Magnesium (As Magnesium Oxide, Aspartate) 300 mg 71%
Zinc (As Zinc Picolinate) 20 mg 182%
Selenium (As Sodium Selenite) 100 mcg 182%
Copper (As Copper Gluconate) 2 mg 222%
Manganese (As Manganese Aspartate) 7 mg 304%
Molybdenum (As Sodium Molybdate) 50 mcg 111%
Betaine HCl 20 mg **
Silicon (As Silicon Dioxide) 5 mg **
Boron (As Boron Aspartate, Rice Protein, Citric Acid Complex) 3 mg **
Vitamin K2 (Menaquinone-7) From Natto (Fermented Soybean Extract) 45 mcg **
Bioavailability Very Good

Absorption Rating

  • Vitamin C (Ascorbic Acid) Fair
  • Vitamin D3 (As Cholecalciferol) Good
  • Vitamin K1 (As Phytonadione) Fair
  • Thiamin (as thiamine HCl) Fair
  • Riboflavin (As Vitamin B2, Riboflavin-5'-Phosphate) Good
  • Niacin (As Niacinamide) Good
  • Vitamin B6 (As Pyridoxine HCl, Pyridoxal-5'-Phosphate) Fair
  • Folate (420 Mcg Folic Acid) (104 Mcg Quatrefolic® Brand (6S)-5-Methyltetrahydrofolate Glucosamine Salt) Good
  • Vitamin B12 (As Cyanocobalamin, Methylcobalamin) Good
  • Pantothenic Acid (As Calcium D-Pantothenate) Good
  • Calcium (As Calcium Carbonate, tribasic calcium phosphate, calcium lactate, calcium Krebs cycle complex‡, calcium citrate) Fair
  • Phosphorus (As Tricalcium calcium Phosphate) Good
  • Magnesium (As Magnesium Oxide, Aspartate) Poor
  • Zinc (As Zinc Picolinate) Good
  • Selenium (As Sodium Selenite) Fair
  • Copper (As Copper Gluconate) Good
  • Manganese (As Manganese Aspartate) Good
  • Molybdenum (As Sodium Molybdate) Good
  • Betaine HCl Fair
  • Silicon (As Silicon Dioxide) Poor
  • Boron (As Boron Aspartate, Rice Protein, Citric Acid Complex) Good
  • Vitamin K2 (Menaquinone-7) From Natto (Fermented Soybean Extract) Good
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Sodium Croscarmellose
  • Stearic Acid
  • Magnesium Stearate
  • Hypromellose
  • Glycerin
Efficacy Very Good

Dosage Analysis

  • Vitamin C (Ascorbic Acid) 120 mg Effective
  • Vitamin D3 (As Cholecalciferol) 20 mcg Effective
  • Vitamin K1 (As Phytonadione) 300 mcg Effective
  • Thiamin (as thiamine HCl) 20 mg Effective
  • Riboflavin (As Vitamin B2, Riboflavin-5'-Phosphate) 20 mg Effective
  • Niacin (As Niacinamide) 50 mg High
  • Vitamin B6 (As Pyridoxine HCl, Pyridoxal-5'-Phosphate) 20 mg Effective
  • Folate (420 Mcg Folic Acid) (104 Mcg Quatrefolic® Brand (6S)-5-Methyltetrahydrofolate Glucosamine Salt) 800 mcg Effective
  • Vitamin B12 (As Cyanocobalamin, Methylcobalamin) 50 mcg Effective
  • Pantothenic Acid (As Calcium D-Pantothenate) 20 mg Effective
  • Calcium (As Calcium Carbonate, tribasic calcium phosphate, calcium lactate, calcium Krebs cycle complex‡, calcium citrate) 800 mg Effective
  • Phosphorus (As Tricalcium calcium Phosphate) 128 mg Under-dosed
  • Magnesium (As Magnesium Oxide, Aspartate) 300 mg Effective
  • Zinc (As Zinc Picolinate) 20 mg Effective
  • Selenium (As Sodium Selenite) 100 mcg Effective
  • Copper (As Copper Gluconate) 2 mg Effective
  • Manganese (As Manganese Aspartate) 7 mg High
  • Molybdenum (As Sodium Molybdate) 50 mcg Effective
  • Betaine HCl 20 mg Under-dosed
  • Silicon (As Silicon Dioxide) 5 mg Effective
  • Boron (As Boron Aspartate, Rice Protein, Citric Acid Complex) 3 mg Effective
  • Vitamin K2 (Menaquinone-7) From Natto (Fermented Soybean Extract) 45 mcg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 10
Total Carbohydrate 2 g 1%†
Vitamin C (Ascorbic Acid) 120 mg 133%
Vitamin D3 (As Cholecalciferol) 20 mcg 100%
Vitamin K1 (As Phytonadione) 300 mcg 250%
Thiamin (as thiamine HCl) 20 mg 1667%
Riboflavin (As Vitamin B2, Riboflavin-5'-Phosphate) 20 mg 1538%
Niacin (As Niacinamide) 50 mg 313%
Vitamin B6 (As Pyridoxine HCl, Pyridoxal-5'-Phosphate) 20 mg 1176%
Folate (420 Mcg Folic Acid) (104 Mcg Quatrefolic® Brand (6S)-5-Methyltetrahydrofolate Glucosamine Salt) 800 mcg 200%
Vitamin B12 (As Cyanocobalamin, Methylcobalamin) 50 mcg 2083%
Pantothenic Acid (As Calcium D-Pantothenate) 20 mg 400%
Calcium (As Calcium Carbonate, tribasic calcium phosphate, calcium lactate, calcium Krebs cycle complex‡, calcium citrate) 800 mg 62%
Phosphorus (As Tricalcium calcium Phosphate) 128 mg 10%
Magnesium (As Magnesium Oxide, Aspartate) 300 mg 71%
Zinc (As Zinc Picolinate) 20 mg 182%
Selenium (As Sodium Selenite) 100 mcg 182%
Copper (As Copper Gluconate) 2 mg 222%
Manganese (As Manganese Aspartate) 7 mg 304%
Molybdenum (As Sodium Molybdate) 50 mcg 111%
Sodium 5 mg <1%
Betaine HCl 20 mg **
Silicon (As Silicon Dioxide) 5 mg **
Boron (As Boron Aspartate, Rice Protein, Citric Acid Complex) 3 mg **
Vitamin K2 (Menaquinone-7) From Natto (Fermented Soybean Extract) 45 mcg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Sodium Croscarmellose Generally_safe

It is used as a binder and disintegrant to help tablets dissolve.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$27$26$25$24$23 Mar 12 $25.29$25.00
iHerb
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
Nature's Way

Founded 1969 · Green Bay, Wisconsin, USA · 481 products · naturesway.com

Certifications

5 certifications
Consumerlab Verified Source
Labdoor Verified Source
Non Gmo Project Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source

Transparency

5 claims
Third Party Testing Claim — Verified Source
Coa Availability — Claimed Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source

Violation History

3 incidents
Fda Warning Violations of the Foreign Supplier Verification Program (FSVP) regulation.2022-12-20Source
Lawsuit Mislabeled and fraudulent herbal supplements.2015Source
Recall Nettle capsules2002-06-28Source
Related Supplements
Frequently Asked Questions
Is Nature's Way OsteoPrime Plus Calcium & Magnesium, 120 Tablets a good supplement?

Nature's Way OsteoPrime Plus Calcium & Magnesium, 120 Tablets received a product quality score of 89/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 25 active ingredients with 30 servings per container. Of the 6 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, Nature's Way, holds a brand trust score of 95/100 with 5 verified certifications including Consumerlab, Labdoor, Non Gmo Project, Nsf Gmp.

What are the ingredients in Nature's Way OsteoPrime Plus Calcium & Magnesium, 120 Tablets?

Nature's Way OsteoPrime Plus Calcium & Magnesium, 120 Tablets contains 25 active ingredients: Calories (10), Total Carbohydrate (2 g), Vitamin C (Ascorbic Acid) (120 mg), Vitamin D3 (As Cholecalciferol) (20 mcg), Vitamin K1 (As Phytonadione) (300 mcg), Thiamin (as thiamine HCl) (20 mg), and 19 more. Notable high-dose ingredients include Vitamin K1 at 250% DV, Thiamin at 1667% DV, Riboflavin at 1538% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Way OsteoPrime Plus Calcium & Magnesium, 120 Tablets safe to take?

Nature's Way OsteoPrime Plus Calcium & Magnesium, 120 Tablets has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Nature's Way a trustworthy supplement brand?

Nature's Way receives a brand trust score of 95/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1969 and headquartered in Green Bay, Wisconsin, USA, the company offers 481 products in their lineup. They hold 5 verified certifications including Consumerlab, Labdoor, Non Gmo Project, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature's Way has 3 historical regulatory incidents on record, which are factored into the trust score.

What is magnesium good for?

Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

How much magnesium per day?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What is zinc good for?

Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

Scan Any Supplement Instantly

Download GoodSupp to scan barcodes, check ingredient safety, and find the best supplements for your needs.

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.