Calcium Citrate, Magnesium and Zinc, 500 Tablets
Scored by the Formulate Research Team · Last reviewed July 2026
Score Breakdown
Three factors carry this score; three more are checked separately and can only take points away. Hover or tap to see what drove each one.
Ingredients per Serving
Certifications & Testing
Other Ingredients
Calcium Citrate, Magnesium Oxide, Cellulose, Croscarmellose Sodium, Magnesium Stearate, Silicon Dioxide, Cellulose Coating, Pyridoxine Hydrochloride, Zinc Oxide, Bororganic Glycine, Manganese Gluconate, Copper Gluconate, Cholecalciferol
Recommended Use
Suggested Use: Take two (2) tablets daily, preferably with a meal.
Warnings
Caution: If you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use. Discontinue use and consult your doctor if any adverse reactions occur. Keep out of the reach of children. Important: Tamper-evident seal under cap. Do not use if printed seal is broken or missing.
Frequently Asked Questions
What is Kirkland Signature Calcium Citrate, Magnesium and Zinc, 500 Tablets's Formulate score?
Kirkland Signature Calcium Citrate, Magnesium and Zinc, 500 Tablets scores 83 out of 100 (grade A-) on Formulate's ingredient-level rubric: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
Is Kirkland Signature Calcium Citrate, Magnesium and Zinc, 500 Tablets worth it?
Kirkland Signature Calcium Citrate, Magnesium and Zinc, 500 Tablets scores 83/100 (grade A-). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Kirkland Signature Calcium Citrate, Magnesium and Zinc, 500 Tablets?
Each serving contains Vitamin D3 (20 mcg), Vitamin B6 (10 mg), Calcium (500 mg), Magnesium (80 mg), and more. Serving size: 2 Tablet(s). 250 servings per container.
How do I take calcium citrate, magnesium and zinc, 500 tablets?
Suggested Use: Take two (2) tablets daily, preferably with a meal.
Who makes Calcium Citrate, Magnesium and Zinc, 500 Tablets?
Calcium Citrate, Magnesium and Zinc, 500 Tablets is made by Kirkland Signature. See Formulate's full grade and product lineup for Kirkland Signature on its brand page.
Is Kirkland Signature Calcium Citrate, Magnesium and Zinc, 500 Tablets third-party tested?
Kirkland Signature lists the following certifications and testing for this product: USP Verified, Gluten-Free.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.