Sundown Naturals Calcium Magnesium & Zinc
Brand: Sundown Naturals · Form: SUPPLEMENT FORM, OTHER [E0172]
Our assessment
The evidence shows that Sundown Naturals Calcium Magnesium & Zinc provides key minerals for bone and muscle function. However, you need to be aware of the significant safety considerations with calcium. Our assessment is that this supplement can be beneficial if you have a confirmed dietary gap, but it is not for everyone due to potential risks and medication interactions.
How it works
Think of this trio as a support system for your body's structure and function. The calcium in this product works by supporting bone mineralization and density, while also helping with neuromuscular relaxation and nerve signaling [NIH ODS]. This means it helps your muscles relax properly and your nerves send clear signals. The specific roles of the magnesium and zinc in this formula are not detailed in the data provided.
Safety profile
The FDA has received a total of 592,059 adverse event reports for all products, but the specific report count for this Sundown Naturals product is not available. For the calcium component specifically, high intakes can cause serious issues. Side effects of high calcium levels include 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]. Some research also suggests high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Critically, calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. You should take this supplement at least 2 hours apart from these medications.
Our recommendation
Our recommendation is to proceed with caution. Before starting, review your total calcium intake from food and other supplements. Do not exceed the tolerable upper intake level. If you take any of the listed medications, consult your doctor or pharmacist about timing your doses. For most people, getting these minerals from a balanced diet is the safest route. Data on the specific amounts of calcium, magnesium, and zinc in this formula is not available, so you cannot verify the dosage.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Sundown Naturals |
|---|---|
| Serving Size | |
| Contents | 100.0 Caplet(s) |
| Market Status | Off 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