Dr. Wong's Essentials Zinc Citrate

Our assessment

The evidence shows that calcium is a foundational mineral for bone health and nerve function, but it requires careful dosing. For a product like Dr. Wong's Essentials Zinc Citrate, which contains calcium, you need to be mindful of your total daily intake from all sources. The data confirms that calcium supports bone density and neuromuscular relaxation [NIH ODS]. However, high intakes may increase the risk of heart disease and prostate cancer [NIH ODS].

How it works

Think of calcium as a structural builder and signal messenger for your body. It works by depositing into your bones to maintain density and strength, a process called bone mineralization [NIH ODS]. It also helps your muscles relax after contracting and supports proper nerve signaling, making it essential for everyday movement and communication between your brain and body [NIH ODS].

Safety profile

Data not available for specific side effect reports for this product. The FDA has received a total of 592,059 adverse event reports across all supplements. For calcium specifically, very 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]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

You should not exceed the recommended daily allowance for calcium without medical supervision. Because high calcium intakes might increase the risk of heart disease and prostate cancer, it is essential to account for calcium from food and other supplements when taking this product [NIH ODS]. If you take any of the listed medications (such as thyroid medication or certain antibiotics), separate your calcium dose by at least two hours [NIH ODS]. Speak with your healthcare provider to determine if this supplement is appropriate for your specific health needs.

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