Natural Factors Stress-Relax Melatonin 1 mg
Brand: Natural Factors · Form: TABLET [E0155]
Our assessment
The evidence shows that calcium is a foundational mineral for bone health, but it is not a sleep aid. For the product Natural Factors Stress-Relax Melatonin 1 mg, the data on calcium provided here is not directly relevant to its sleep-promoting effects. You should focus on the melatonin content for relaxation, not the calcium.
How it works
Calcium supports bone mineralization and neuromuscular relaxation, which helps your muscles relax and your nerves signal properly [NIH ODS]. While this is important for overall body function, the specific sleep-related mechanism in this product is driven by melatonin, not calcium. Calcium’s role in nerve signaling is a general physiological process [NIH ODS].
Safety profile
FDA received 592,059 total adverse event reports across all supplement categories [FDA data]. For calcium specifically, high intakes may increase the risk of heart disease and prostate cancer [NIH ODS]. High levels in blood and urine can cause poor muscle tone, poor kidney function, constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can reduce absorption of medications including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Data not available on specific adverse event counts for this product alone.
Our recommendation
For relaxation and sleep support, rely on the melatonin in this product. If you are taking calcium for bone health, stick to the RDA of 1,000 mg per day for most adults and avoid exceeding 2,000 mg from supplements and diet combined [NIH ODS]. Always take calcium supplements separately from your thyroid or antibiotic medications by at least 2 hours [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