What’s inside this formula?
Natural Factors’s Calcium & Magnesium Citrate with D3 is listed here in the calcium collection. This article looks at the selected 210 tablets pack, then puts its ingredients into context.
Per tablet: calcium 250 mg, magnesium 250 mg, potassium 20 mg, zinc 5 mg, manganese 1 mg, silicon from horsetail 100 mcg and D3 2.5 mcg (100 IU). Magnesium is citrate/oxide.
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.
Do not assume citrate alone
Calcium is citrate, but the magnesium source combines citrate and oxide. The 250 mg values are elemental mineral quantities per tablet.
Two-tablet comparison
The adult daily direction is two tablets with food: 500 mg calcium, 500 mg magnesium and 5 mcg D3. The photographed bonus bottle contains 210 tablets, not 180.
Source naming discrepancy
The manufacturer URL ends in “capsules”, but its current title, ingredient table and selectable 210-count variant all identify tablets. This record follows those visible details and retains the supplemental-magnesium caution.
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?
Two tablets give 500 mg supplemental magnesium, above the NIH adult upper limit of 350 mg unless professionally directed. Diarrhea is possible. Review kidney function and medication spacing.
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
Vegetarian The current Canadian manufacturer explicitly labels this whole tablet formula suitable for vegetarians; D3 origin and vegan suitability are not confirmed.
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 & Magnesium Citrate with D3 and the 210 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?
Some product-profile links are paid links and are labelled. As an Amazon Associate we earn from qualifying purchases. Manufacturer source links are provided for checking the label. Read our affiliate disclosure.
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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