Nature's Plus Cal/Mag Caps supplement bottle
Nature's Plus

Cal/Mag Caps Review

What We Researched
2 active ingredients analyzed · 8 inactive ingredients decoded · 7 brand certifications checked · Last updated: Aug 2026
100
Product Score Excellent
99
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Magnesium 250 mg —
Calcium 500 mg —
Bioavailability Excellent

Absorption Rating

  • Magnesium Good
  • Calcium Good
Other Ingredients Excellent

Fillers & Additives

  • Magnesium Stearate
  • Microcrystalline Cellulose
  • Calcium Carbonate
  • Vegetable Cellulose
  • Stearic Acid
  • Magnesium Oxide
  • Silica
  • Purified Water
Efficacy Excellent

Dosage Analysis

  • Magnesium 250 mg Effective
  • Calcium 500 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Magnesium 250 mg
Calcium 500 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Microcrystalline Cellulose Safe

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

Calcium Carbonate Safe

Acts as a filler and provides supplemental calcium.

Vegetable Cellulose Safe

Forms a vegetarian capsule shell alternative to gelatin.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Magnesium Oxide Generally_safe

It is used to provide magnesium, an essential mineral.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Purified Water Safe

Dissolves and carries water-soluble ingredients.

Brand Trust Report
Nature's Plus

Founded 1972 · Melville, New York, United States · 340 products · naturesplus.com

Certifications

7 certifications
Clean Label Project Verified Source
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Health Canada Licensed Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source
NSF Certified Verified

Transparency

4 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
Contains Proprietary Blend — True

Violation History

11 incidents
Prop 65 Lead2025-02-19Source
Prop 65 Lead and lead compounds2024-04-05Source
Prop 65 Lead2024-02-16Source
Prop 65 Not specified2024-02-16Source
Lawsuit Misrepresentation of supplement dosage2024Source
Lawsuit Misrepresentation of supplement dosage on product labels.2024Source
Recall NaturesPlus Keto Living Sugar Control Capsules, 90 count2022-05-06Source
Recall NaturesPlus Keto Living Sugar Control Capsules2022-05-06Source
Lawsuit Breach of contract2016Source
Recall Digestive Enzyme, Nature Cleanse Botanicleanse Tabs, Betaine HCL and Ultra-Zyme2001-05-09Source
Fda Warning Letter FDA Warning LetterSource
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Frequently Asked Questions
Is Nature's Plus Cal/Mag Caps a good supplement?

Nature's Plus Cal/Mag Caps received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 2 active ingredients with 45 servings per container. Of the 8 inactive ingredients, 7 are rated safe and 0 are flagged for review. The manufacturer, Nature's Plus, holds a brand trust score of 99/100 with 7 verified certifications including Clean Label Project, Consumerlab, Fda Gmp Inspections, Health Canada Licensed.

What are the ingredients in Nature's Plus Cal/Mag Caps?

Nature's Plus Cal/Mag Caps contains 2 active ingredients: Magnesium (250 mg), Calcium (500 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Plus Cal/Mag Caps safe to take?

Nature's Plus Cal/Mag Caps 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 Plus a trustworthy supplement brand?

Nature's Plus receives a brand trust score of 99/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1972 and headquartered in Melville, New York, United States, the company offers 340 products in their lineup. They hold 7 verified certifications including Clean Label Project, Consumerlab, Fda Gmp Inspections, Health Canada Licensed. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature's Plus has 11 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 — read our methodology. 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.