What’s inside this formula?
Natural Factors’s Calcium Citrate — 350 mg is listed here in the calcium collection. This article looks at the selected 90 tablets pack, then puts its ingredients into context.
One tablet provides 350 mg calcium as citrate (27% of the US Daily Value). The selected bottle contains 90 tablets.
Check the original label ↗Calcium provides structure to bones and teeth and participates in muscle and nerve function. Food intake is the starting point when considering a supplement. A compound such as calcium citrate or carbonate contains only a proportion of calcium, so compare the declared elemental amount and serving size.
The pack details above come from the manufacturer. Ingredient research below does not establish the effects of this exact product or independently verify its contents.
Compare elemental calcium
The 350 mg is the calcium nutrient amount, not the gross weight of the citrate salt. This product does not list added vitamin D in the current Supplement Facts.
A plain calcium option
The 90-tablet US bottle is distinct from the brand’s calcium-magnesium-D3 blend. The manufacturer describes one tablet up to four times daily, which should not be treated as a universal requirement.
Consider total intake
Diet, fortified foods and other tablets all contribute calcium. NIH notes interactions with medicines including levothyroxine; a pharmacist can give spacing for the exact medication.
Where might it be useful?
Bone maintenance
Adequate calcium is one part of maintaining bones alongside vitamin D, activity and other aspects of care.
Normal signalling
Calcium is needed for muscle contraction, nerve signalling and other normal body processes.
What the research can — and cannot — tell us
Calcium is essential, but adding more than needed does not guarantee stronger bones. Product comparisons should account for food intake, the number of tablets per serving and any vitamin D or magnesium included. Evidence about calcium cannot automatically validate every combination formula.
What deserves your attention?
Account for dietary calcium and other supplements. Review kidney-stone history and medicine timing, particularly levothyroxine and some antibiotics, with a professional.
Suitability comes before strength
Discuss supplements with a clinician if you have kidney disease, kidney stones or use medicines that interact with calcium. Larger doses may cause digestive problems or exceed your needs.
Dietary details for this product
Vegan The current complete US formula lists no animal products; excipients are croscarmellose sodium, cellulose/glycerin coating and vegetable-grade magnesium stearate.
A dietary label and an allergy assessment answer different questions. Check every ingredient, the capsule or softgel materials and the allergen statement on the pack you receive. If you take medicines, have a health condition, are pregnant or are choosing for a child, discuss the full formula with a qualified clinician.
Make the comparison meaningful.
- Match the exact version.Look for Natural Factors · Calcium Citrate — 350 mg and the 90 tablets pack. A similar name or bottle can contain a different strength, blend or serving.
- Compare like with like.Read the serving size alongside the active ingredient amount. Capsule count, compound weight and total blend weight can describe different things. Use the label notes above to see what matters for this formula.
- Check the seller and final cost.Review seller identity, expiry, batch details and any Indian import information. Compare the final delivered price only after matching the formula. Prices and stock are checked on the retailer’s site.
Keep the label beside the decision.
Open the complete product profile for its source, dietary notes and available shopping destination.
Is this an endorsement or a medical recommendation?
No. This is an editorial guide to a selected product and its ingredient context. We have not independently tested this bottle or established a clinical benefit for this exact formula. A product’s inclusion is not a recommendation that everyone should take it.
Does Proof & Price earn from shopping links?
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Read, check, decide.
Product label reviewed 2026-10-29. Ingredient context reviewed 2026-10-26. This article has not received independent clinical review. Packaging and formulas can change; the current pack takes precedence.
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