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Kirkland Signature Calcium 600 mg with Vitamin D3 is a tablet sold under the Kirkland Signature brand. Its label lists 2 vitamins and minerals. At the label's highest daily amount (2 tablets a day), none of its vitamins and minerals with an upper limit goes above 80% of the limit for adults, from this product alone.
Take other supplements too? Add this one to the Supplement Checker and see your daily totals next to the limits for your age.
Add Kirkland Signature Calcium 600 mg with Vitamin D3 to the Supplement Checker
What’s in Kirkland Signature Calcium 600 mg with Vitamin D3
| Ingredient | Per serving | Per day | Share of the adult limit |
|---|---|---|---|
| Vitamin D3 | 10 mcg | 20 mcg | 20% (under the adult limit) |
| Calcium | 600 mg | 1,200 mg | 48% (under the adult limit) |
“Share of the adult limit” compares the daily amount with the upper limit for adults 19 to 50 (From age 51 the calcium limit is 2,000 mg; from age 71 the phosphorus limit is 3,000 mg). For most nutrients the limit counts food too.
How to take Kirkland Signature Calcium 600 mg with Vitamin D3 (from the label)
- The label says: “Suggested use: Adults – Take one (1) tablet two times daily, preferably with a meal.”
Kirkland Signature Calcium 600 mg with Vitamin D3 warnings (from the label)
- “Caution: Pregnant or nursing women, individuals taking medication(s) or persons who have a health condition should consult their physician before using this product.”
- “Keep out of the reach of children.”
- “Important: Tamper-evident seal under cap. Do not use if printed seal is broken or missing.”
Other ingredients
Calcium Carbonate, Maltodextrin, Cholecalciferol, Croscarmellose Sodium, Glycerin, Hydroxypropyl Methylcellulose, Medium Chain Triglycerides, Mineral Oil.
FDA recalls for Kirkland Signature
The FDA enforcement records list no supplement recall under the name Kirkland Signature (searched November 9, 2026). That doesn’t mean a product is safe; see our supplement recall tracker for recent recalls.
Who sells it
Costco Wholesale Corporation, Seattle, WA (as printed on the label).
If you think you or a child took too much of a supplement, call Poison Control at 1-800-222-1222 (U.S., free, 24 hours) or use poison.org. In an emergency, call 911.
Sources: NIH Dietary Supplement Label Database, label 287360; upper limits from the National Academies Dietary Reference Intakes. Labels change: check the amounts on your bottle.
General information, not medical advice. Your doctor may recommend a different amount, for example to treat a deficiency. Talk to your doctor or pharmacist before you start, stop or change a supplement, especially if you are pregnant, nursing, take medication or have a medical condition.