Kirkland Signature Calcium Citrate Magnesium And Zinc
Brand: Kirkland Signature · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that this multivitamin provides a solid foundation for bone and immune health. The combination of calcium, magnesium, and zinc is well-researched, and the specific doses in this product support your daily mineral needs [NIH ODS].
How it works
Think of this combination as a team for your bones and muscles. Calcium is essential for bone mineralization and helps your muscles relax after contracting. Magnesium supports nerve signaling and muscle function, while zinc plays a key role in immune defense and tissue repair [NIH ODS]. Together, they work synergistically to maintain healthy bone density and neuromuscular function.
Safety profile
FDA received 592,059 adverse event reports across all supplements. For this specific product, data on side effects is not available. However, some research suggests that high calcium intakes might increase the risk of heart disease and prostate cancer. High levels of calcium in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS].
Our recommendation
Start with the serving size on the label. Take this supplement with food to improve absorption. Be aware that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. If you take any of these medications, separate your doses by at least two hours. This is a good choice for general bone and immune support, but consult your doctor before starting if you have kidney issues or a history of heart disease [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Kirkland Signature |
|---|---|
| Serving Size | |
| Contents | 500.0 Tablet(s) |
| Market Status | On Market |
How to Read This Label
Supplement labels contain several key sections regulated by the FDA:
- Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
- Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
- % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
- Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
- Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.
Source: FDA Dietary Supplement Labeling Guide