NewtonEverett Zinc 25 mg

Our assessment

Our assessment: Zinc is an essential mineral that supports your immune system, but the evidence shows that a 25 mg dose is above the recommended dietary allowance for most adults. The National Institutes of Health Office of Dietary Supplements notes that the RDA for zinc is 8 mg for women and 11 mg for men [NIH ODS]. While 25 mg is within the tolerable upper intake level, you should be aware that long-term use at this dose could lead to copper deficiency [NIH ODS].

How it works

Think of zinc as a gatekeeper for your immune cells — it helps your body produce and activate T-cells, which are critical for fighting off infections. Zinc also supports wound healing, DNA synthesis, and proper growth during childhood and pregnancy [NIH ODS]. Because your body does not store zinc, you need a regular dietary supply to keep these processes running smoothly.

Safety profile

FDA received 592,059 total adverse event reports for all supplement categories. For zinc specifically, side effects from oral supplements can include nausea, vomiting, loss of appetite, stomach cramps, diarrhea, and headaches [NIH ODS]. Taking 25 mg on an empty stomach is more likely to cause gastrointestinal upset. Long-term intake above 40 mg daily can lead to copper deficiency, which may cause neurological issues and anemia [NIH ODS].

Our recommendation

For most adults, we recommend starting with a lower dose between 8–11 mg daily from food or supplements [NIH ODS]. If you choose to take 25 mg, do not exceed this amount and consider taking it with food to reduce stomach upset. Because high zinc intake can interfere with copper absorption, you may need a copper supplement if you take 25 mg for more than a few months. Consult your healthcare provider before starting, especially if you take antibiotics or other medications [NIH ODS].

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