NOW Zinc 50 mg
Brand: NOW · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that zinc is an essential mineral for immune function, but a 50 mg dose is significantly higher than the recommended daily allowance. For most adults, the RDA is 11 mg for men and 8 mg for women [NIH ODS]. Our assessment is that this high dose should only be used under medical supervision for a specific, short-term purpose.
How it works
Think of zinc as a gatekeeper for your immune system. It is required for the development and activation of immune cells, helping your body respond to threats [NIH ODS]. It also supports wound healing, DNA synthesis, and normal growth and development during pregnancy, childhood, and adolescence [NIH ODS].
Safety profile
Data not available for this specific product. However, the FDA received a total of 592,059 adverse event reports across all products [FDA data]. High zinc intake, such as from a 50 mg supplement, can cause copper deficiency, nausea, vomiting, loss of appetite, stomach cramps, diarrhea, and headaches [NIH ODS]. Taking 50 mg daily for an extended period may also suppress your immune system rather than support it [NIH ODS].
Our recommendation
We do not recommend starting with a 50 mg zinc supplement without a confirmed deficiency and guidance from a healthcare provider. For general health, a multivitamin or a 15-30 mg zinc supplement is more appropriate. Always take zinc with food to reduce stomach upset, and be aware that zinc can interfere with the absorption of antibiotics and other medications [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 100.0 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