Sundown Naturals Zinc Lozenges plus Vitamin C
Brand: Sundown Naturals · Form: LOZENGE [E0174] On Market
Our assessment
The evidence shows that while this product combines two familiar ingredients, the specific data available to us is limited. The primary ingredient of interest, calcium, has strong support for bone health, but the benefits of zinc and vitamin C lozenges are often overstated for general immune support. You should be cautious about expecting dramatic results from this specific formulation.
How it works
Calcium acts as a master regulator for your bones and muscles — it supports bone density and mineral deposition, and it helps your muscles relax and nerves signal properly [NIH ODS]. For the zinc and vitamin C components, specific data on their combined mechanism in lozenge form is not available. The calcium mechanism is well-documented, but the overall product's effect relies on these general properties.
Safety profile
Data not available for the specific adverse event report count for this product. The FDA received a total of 592,059 adverse event reports for all dietary supplements [FDA data]. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. High levels of calcium in your 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]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Given the limited data on this specific product, our recommendation is cautious. If you choose to use it, do not exceed the dosage on the label, and be aware of the potential for calcium to interfere with other medications you take. For general bone health, a standard calcium supplement with vitamin D is better studied. For immune support, focus on a balanced diet and adequate sleep. Always consult your physician before starting a new supplement, especially if you take prescription medications [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Sundown Naturals |
|---|---|
| Serving Size | |
| Contents | 50.0 Lozenge(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