Natrol Melatonin 5 mg Fast Dissolve Strawberry Natural Flavor

Our assessment

The evidence shows that while calcium is essential for bone health, the specific product you asked about — Natrol Melatonin 5 mg Fast Dissolve Strawberry — contains melatonin, not calcium. Data for calcium supplements is provided for general reference, but it does not apply to this product. For melatonin specifically, data on its mechanism and safety from the provided sources is not available.

How it works

Calcium acts as a master regulator for your body. It supports bone mineralization and density, and it is critical for neuromuscular relaxation and nerve signaling [NIH ODS]. However, this mechanism applies to calcium, not to the melatonin product you are asking about.

Safety profile

FDA received a total of 592,059 adverse event reports across all dietary supplements. For calcium specifically, high intakes may increase the risk of heart disease and prostate cancer. High levels 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] [FDA data]. These risks are not directly tied to the melatonin product you referenced.

Our recommendation

For the Natrol Melatonin 5 mg product, data on specific dosing, benefits, and side effects is not available from the provided sources. For general calcium needs, you should be aware that calcium can reduce absorption of medications like bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS]. Always consult your pharmacist or doctor before starting any new supplement, especially if you take prescription medications.

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