21st Century Melatonin 5 mg
Brand: 21st Century · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that 21st Century Melatonin 5 mg is a dietary supplement intended to support sleep, but the data provided does not include specific studies or claims for melatonin itself. Our assessment is based strictly on the ingredient data available, which is for calcium, not melatonin. For melatonin, specific health benefits and mechanisms are not detailed in the provided information.
How it works
Based on the data provided, the ingredient calcium supports bone mineralization and neuromuscular relaxation [NIH ODS]. Think of calcium as a key structural component for your bones and a regulator for muscle and nerve function [NIH ODS]. For melatonin, data on its mechanism of action is not available in this report.
Safety profile
Data not available for melatonin-specific side effects. The FDA has received a total of 592,059 adverse event reports across all supplements, but specific report counts for 21st Century Melatonin are not provided [FDA data]. For the ingredient calcium, high intakes may increase the risk of heart disease and prostate cancer, and can cause side effects such as constipation, nausea, weight loss, and abnormal heart rhythms [NIH ODS].
Our recommendation
Our recommendation: Because no melatonin-specific data was provided, we cannot confirm the efficacy or safety of 21st Century Melatonin 5 mg for sleep support. You should consult your healthcare provider before starting any new supplement, especially one where specific clinical evidence is not available. If you choose to use it, start with the lowest effective dose and monitor for any adverse effects.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | 21st Century |
|---|---|
| Serving Size | |
| Contents | 100.0 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