NOW Ultimate Zinc-C
Brand: NOW · Form: LOZENGE [E0174] On Market
Our assessment
Our assessment: Zinc is a critical mineral for immune function, but the evidence shows that the specific product "NOW Ultimate Zinc-C" is not supported by the data provided. Data for this specific product is not available, so we must focus on the ingredient calcium, which is listed on the label. The data confirms that calcium supports bone mineralization and neuromuscular relaxation [NIH ODS].
How it works
Think of calcium as a master regulator for your bones and muscles — it helps your body deposit minerals into bone tissue and supports nerve signaling for muscle relaxation and contraction [NIH ODS]. This mechanism is essential for maintaining strong bones and proper muscle function throughout your life.
Safety profile
FDA received 592059 total adverse event reports across all supplement categories. For calcium specifically, some research suggests that high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. High levels of calcium 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
Our recommendation: Since data for "NOW Ultimate Zinc-C" is not available, we cannot endorse this specific product. If you are considering a calcium supplement, be aware of the potential risks and medication interactions. Data not available for the specific product formulation. Always consult your healthcare provider before starting any new supplement, especially if you take prescription medications [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 100.0 Lozenge(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