21st Century Stress B with Zinc
Brand: 21st Century · Form: TABLET [E0155]
Our assessment
The evidence shows that 21st Century Stress B with Zinc is a multivitamin supplement, but you should know that specific data on this exact product is limited beyond its listed ingredients. The formula contains calcium, which has well-documented benefits and risks. We can assess the calcium component, but full product-specific claims are not available from the provided data.
How it works
Calcium in this supplement supports your body in two key ways. First, it promotes bone mineralization, helping to deposit minerals into your skeleton for density and strength. Second, it supports neuromuscular relaxation, which aids in proper muscle function and nerve signaling [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports across all supplements, but specific report counts for this product are not available. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. Very high calcium levels can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
You can consider this supplement as part of a balanced routine, but be cautious with calcium content. Do not exceed your total daily calcium needs from supplements and food combined. If you take prescription medications, separate calcium intake by at least 2 hours to avoid absorption issues [NIH ODS]. For specific dosing advice beyond general calcium guidance, data is not available for this exact product.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | 21st Century |
|---|---|
| Serving Size | |
| Contents | 66.0 Tablet(s) |
| Market Status | Off 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