Dr. Clark Research Association Dr. Clark Zentrum Zinc 30 mg

Our assessment

The evidence shows that this product contains 30 mg of zinc per serving, which is a common supplemental dose. However, based on the data provided, the primary ingredient available for review is calcium, not zinc. For the specific zinc product you asked about, detailed mechanism and safety data are not available in the provided information. We can only assess the calcium data here, which supports bone health and nerve function [NIH ODS].

How it works

Think of calcium as a structural builder for your skeleton. It supports bone density and mineral deposition, and it also plays a role in neuromuscular relaxation and nerve signaling [NIH ODS]. For zinc, a separate ingredient profile would be needed to explain its mechanism, but that data is not provided here.

Safety profile

For calcium, the data indicates that high intakes might increase the risk of heart disease and prostate cancer. High levels in the 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]. The FDA received a total of 592,059 adverse event reports across all products, but specific report counts for this zinc product are not available [FDA data].

Our recommendation

Without specific data on the zinc ingredient in this product, we cannot make a full assessment. For calcium, which is not the primary ingredient here, we advise you to be aware of the risks of high intake, including constipation and potential heart issues [NIH ODS]. You should consult your healthcare provider before starting any new supplement, especially if you take medications like bisphosphonates or antibiotics, as calcium can reduce their absorption [NIH ODS]. For zinc-specific guidance, data is not available in this review.

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