21st Century Stress B with Zinc
Brand: 21st Century · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that 21st Century Stress B with Zinc is a supplement intended to support stress response, but our assessment must be based strictly on the data available. For the specific ingredients in this product, the data provided only includes information on the mineral Calcium. Data on the B vitamins and Zinc in this specific formulation are not available from the provided sources.
How it works
Regarding the ingredient Calcium, which is listed in the provided data, it acts as a master regulator for bone health by supporting bone density and mineral deposition. It also plays a role in neuromuscular relaxation, helping to support muscle relaxation and nerve signaling [NIH ODS].
Safety profile
The FDA has received a total of 592,059 adverse event reports for all dietary supplements. For the specific ingredient Calcium, some research suggests that high intakes might increase the risk of heart disease and prostate cancer. 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
Because the provided data does not include specific information on the B vitamins or Zinc for this product, a specific recommendation for 21st Century Stress B with Zinc cannot be made from this data alone. If you are considering this supplement, we advise you to consult with your healthcare provider to discuss your individual needs and potential interactions with any medications you may be taking. Data not available for the specific formulation's ingredients beyond Calcium.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | 21st Century |
|---|---|
| Serving Size | |
| Contents | 66.0 Tablet(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