Rainbow Light Calcium with Magnesium & Vitamin D3+, 90 Tablets supplement bottle
Rainbow Light

Calcium with Magnesium & Vitamin D3+, 90 Tablets

What We Researched
7 active ingredients analyzed · 6 inactive ingredients decoded · 6 brand certifications checked · 3 retailers compared · Last updated: Mar 2026
78
Product Score Fair
86
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D (as Vegan D3 cholecalciferol) (500 IU) 12.5 mcg 63%
Calcium (as Carbonate, Amino Acid Chelate, Citrate-Malate) 500 mg 38%
Magnesium (as Oxide, Aspartate) 250 mg 60%
Betaine hydrochloride 20 mg **
Stinging nettle extract (leaf) 20 mg **
Bamboo Extract (stem and/or leaf, shoot) 20 mg **
Organic Spirulina 20 mg **
Bioavailability Very Good

Absorption Rating

  • Vitamin D (as Vegan D3 cholecalciferol) (500 IU) Good
  • Calcium (as Carbonate, Amino Acid Chelate, Citrate-Malate) Good
  • Magnesium (as Oxide, Aspartate) Good
  • Betaine hydrochloride Good
  • Stinging nettle extract (leaf) Fair
  • Bamboo Extract (stem and/or leaf, shoot) Fair
  • Organic Spirulina Good
Other Ingredients Excellent

Fillers & Additives

  • Cellulose (Plant Origin)
  • Cellulose Gum
  • Vegetable Stearic Acid
  • Vegetable Magnesium Stearate
  • Silica
  • Organic Plant-Based Coating
Efficacy Poor

Dosage Analysis

  • Vitamin D (as Vegan D3 cholecalciferol) (500 IU) 12.5 mcg Under-dosed
  • Calcium (as Carbonate, Amino Acid Chelate, Citrate-Malate) 500 mg Effective
  • Magnesium (as Oxide, Aspartate) 250 mg Effective
  • Betaine hydrochloride 20 mg Under-dosed
  • Stinging nettle extract (leaf) 20 mg Under-dosed
  • Bamboo Extract (stem and/or leaf, shoot) 20 mg Under-dosed
  • Organic Spirulina 20 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D (as Vegan D3 cholecalciferol) (500 IU) 12.5 mcg 63%
Calcium (as Carbonate, Amino Acid Chelate, Citrate-Malate) 500 mg 38%
Magnesium (as Oxide, Aspartate) 250 mg 60%
Betaine hydrochloride 20 mg **
Stinging nettle extract (leaf) 20 mg **
Bamboo Extract (stem and/or leaf, shoot) 20 mg **
Organic Spirulina 20 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose (Plant Origin) Safe

It is used as a filler, binder, or thickener.

Cellulose Gum Safe

Thickens and stabilizes supplement formulations.

Vegetable Stearic Acid Generally_safe

It is used to prevent ingredients from sticking to manufacturing equipment.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Organic Plant-Based Coating Safe

It is used to coat tablets or capsules.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$26$24$22$20$18 Mar 12 $23.79$20.22
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
Rainbow Light

Founded 1981 · Santa Cruz, California, USA (Founding Location) · 60 products · rainbowlight.com/

Certifications

6 certifications
Clean Label Project Verified Source
Consumerlab Verified Source
Labdoor Verified Source
Fda Gmp Inspections Verified Source
Non Gmo Project Verified Source
Usda Organic Verified Source

Transparency

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

Violation History

2 incidents
Prop 65 Lead2019-08-15Source
Lawsuit False advertising regarding the presence of heavy metals in prenatal vitamins.2019Source
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Frequently Asked Questions
Is Rainbow Light Calcium with Magnesium & Vitamin D3+, 90 Tablets a good supplement?

Rainbow Light Calcium with Magnesium & Vitamin D3+, 90 Tablets received a product quality score of 78/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 7 active ingredients with 90 servings per container. Of the 6 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, Rainbow Light, holds a brand trust score of 86/100 with 6 verified certifications including Clean Label Project, Consumerlab, Labdoor, Fda Gmp Inspections.

What are the ingredients in Rainbow Light Calcium with Magnesium & Vitamin D3+, 90 Tablets?

Rainbow Light Calcium with Magnesium & Vitamin D3+, 90 Tablets contains 7 active ingredients: Vitamin D (as Vegan D3 cholecalciferol) (500 IU) (12.5 mcg), Calcium (as Carbonate, Amino Acid Chelate, Citrate-Malate) (500 mg), Magnesium (as Oxide, Aspartate) (250 mg), Betaine hydrochloride (20 mg), Stinging nettle extract (leaf) (20 mg), Bamboo Extract (stem and/or leaf, shoot) (20 mg), and 1 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Rainbow Light Calcium with Magnesium & Vitamin D3+, 90 Tablets safe to take?

Rainbow Light Calcium with Magnesium & Vitamin D3+, 90 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 Rainbow Light a trustworthy supplement brand?

Rainbow Light receives a brand trust score of 86/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1981 and headquartered in Santa Cruz, California, USA (Founding Location), the company offers 60 products in their lineup. They hold 6 verified certifications including Clean Label Project, Consumerlab, Labdoor, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Rainbow Light has 2 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.

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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.