Calcium Citrate
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
Croscarmellose Sodium, Coating, Magnesium Stearate
Recommended Use
Suggested Usage: 1 tablet per day or as directed by a health professional.
Warnings
Cautions: As with any supplement, consult your health professional before use if you are pregnant, breastfeeding or trying to conceive, or if you are taking medication, have a medical condition or anticipate a surgery. Keep out of the reach of children. Sealed for your protection. Do not use if seal is broken.
Frequently Asked Questions
What is Natural Factors Calcium Citrate's Formulate score?
Natural Factors Calcium Citrate scores 90 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 Natural Factors Calcium Citrate worth it?
Natural Factors Calcium Citrate scores 90/100 (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 Natural Factors Calcium Citrate?
Each serving contains Calcium (350 mg). Serving size: 1 Tablet(s). 90 servings per container.
How do I take calcium citrate?
Suggested Usage: 1 tablet per day or as directed by a health professional.
Who makes Calcium Citrate?
Calcium Citrate is made by Natural Factors. See Formulate's full grade and product lineup for Natural Factors on its brand page.
Is Natural Factors Calcium Citrate third-party tested?
Natural Factors lists the following certifications and testing for this product: Vegan, Vegetarian, Gluten-Free, Dairy-Free, Sugar-Free.
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