Natural Factors Stress-Relax Melatonin 5 mg
Brand: Natural Factors · Form: TABLET [E0155]
Our assessment
The evidence shows that calcium is a critical mineral for bone health, but it is not the active ingredient in this product. For Natural Factors Stress-Relax Melatonin 5 mg, the primary ingredient is melatonin, and data for calcium is provided for general reference only. You should not expect calcium-related benefits from this supplement.
How it works
Calcium supports bone mineralization and neuromuscular relaxation, helping your bones stay dense and your muscles relax properly [NIH ODS]. However, this product contains melatonin, which works differently to support sleep regulation. Data on melatonin’s mechanism for this specific product is not available.
Safety profile
FDA received 592,059 total adverse event reports across all supplements. For calcium specifically, high intakes may increase the risk of heart disease, prostate cancer, and can cause poor muscle tone, poor kidney function, constipation, nausea, weight loss, extreme tiredness, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS] [FDA data]. Calcium can also reduce absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Side effects for melatonin in this specific product are not available.
Our recommendation
We recommend you focus on the intended ingredient, melatonin, for sleep support. For calcium needs, rely on dietary sources or separate calcium supplements. 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 | Natural Factors |
|---|---|
| Serving Size | |
| Contents | 90.0 Chewable 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