Sundown Naturalist Extra Strength Melatonin 5 mg

Our assessment

The evidence shows that Sundown Naturalist Extra Strength Melatonin 5 mg contains melatonin as its primary active ingredient. However, the data provided does not include any information about melatonin's efficacy, mechanism of action, or safety profile. Data not available for melatonin-specific benefits or risks. The FDA adverse event database contains 592,059 total reports across all supplements, but specific adverse event counts for melatonin are not provided in the data [FDA data].

How it works

Data not available for melatonin's mechanism of action. The data provided describes calcium, not melatonin. For calcium, think of it as a structural supporter — it supports bone density and mineral deposition through bone mineralization and supports muscle relaxation and nerve signaling through neuromuscular relaxation [NIH ODS].

Safety profile

Data not available for melatonin-specific side effects. The FDA adverse event database includes 592,059 total reports across all supplements, but no breakdown by product or ingredient is provided [FDA data]. For calcium, which is not the active ingredient in this product, side effects include 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 at high levels [NIH ODS].

Our recommendation

Data not available to make a specific recommendation for Sundown Naturalist Extra Strength Melatonin 5 mg. The data provided does not contain any information about melatonin dosage, efficacy, or safety for sleep support. Consult your healthcare provider before starting this or any supplement, especially if you take other medications. Note that calcium supplements can reduce the absorption of bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

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