Swanson Premium Brand Zinc (Gluconate) 30 mg
Brand: Swanson Premium Brand · Form: TABLET [E0155]
Our assessment
The evidence shows that zinc gluconate, in a 30 mg dose like the Swanson Premium Brand product, is a well-established supplement for supporting immune function. However, you should be aware that this dose is significantly higher than the Recommended Dietary Allowance (RDA) of 11 mg for men and 8 mg for women, so careful use is important [NIH ODS].
How it works
Think of zinc as a master regulator for your immune system. It helps activate T-cells (your body's frontline defenders) and supports the structure of proteins and cell membranes. The gluconate form is a common and well-absorbed type of zinc supplement [NIH ODS].
Safety profile
FDA has received a total of 592,059 adverse event reports across all supplements, but specific reports for this exact product are not available. For zinc, the NIH ODS notes that long-term intake above 40 mg daily can lead to copper deficiency and nerve damage. Common side effects at high doses include nausea, vomiting, and stomach cramps [NIH ODS] [FDA data].
Our recommendation
Start with a lower dose, such as 15 mg daily, unless you have a specific deficiency confirmed by a blood test. Take this zinc supplement with food to reduce stomach upset, but avoid taking it at the same time as high-calcium foods or supplements, as calcium can reduce zinc absorption [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Swanson Premium Brand |
|---|---|
| Serving Size | |
| Contents | 250.0 Tablet(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