Sunshine Vitamins Instant CalMag-C supplement bottle
Sunshine Vitamins

Instant CalMag-C

What We Researched
3 active ingredients analyzed · 4 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
79
Product Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as ascorbic acid) 300mg 333%
Calcium (as gluconate) 284mg 22%
Magnesium (as carbonate) 123mg 29%
Bioavailability Very Good

Absorption Rating

  • Vitamin C (as ascorbic acid) Fair
  • Calcium (as gluconate) Good
  • Magnesium (as carbonate) Good
Other Ingredients Excellent

Fillers & Additives

  • Citric Acid
  • Calcium Gluconate
  • Magnesium Carbonate
  • Ascorbic Acid
Efficacy Poor

Dosage Analysis

  • Vitamin C (as ascorbic acid) 300mg Effective
  • Calcium (as gluconate) 284mg Under-dosed
  • Magnesium (as carbonate) 123mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as ascorbic acid) 300mg 333%
Calcium (as gluconate) 284mg 22%
Magnesium (as carbonate) 123mg 29%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Citric Acid Safe

Adds tartness and acts as a natural preservative. Also aids in ingredient stability.

Calcium Gluconate Safe

It is used as a source of calcium.

Magnesium Carbonate Generally_safe

It is used as a filler or anti-caking agent.

Ascorbic Acid Safe

Prevents oxidation and provides vitamin C.

Price Comparison

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

Brand Trust Report
Sunshine Vitamins

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Frequently Asked Questions
Is Sunshine Vitamins Instant CalMag-C a good supplement?

Sunshine Vitamins Instant CalMag-C received a product quality score of 79/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 3 active ingredients with 40 servings per container. Of the 4 inactive ingredients, 3 are rated safe and 0 are flagged for review.

What are the ingredients in Sunshine Vitamins Instant CalMag-C?

Sunshine Vitamins Instant CalMag-C contains 3 active ingredients: Vitamin C (as ascorbic acid) (300mg), Calcium (as gluconate) (284mg), Magnesium (as carbonate) (123mg). Notable high-dose ingredients include Vitamin C at 333% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Sunshine Vitamins Instant CalMag-C safe to take?

Sunshine Vitamins Instant CalMag-C 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.

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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.