Sundown Naturals Melatonin 300 mcg

Our assessment

The evidence shows that Sundown Naturals Melatonin 300 mcg is a low-dose melatonin supplement. Our assessment is that this product offers a minimal amount of melatonin, which is 0.3 mg. Data not available on the specific efficacy or bioavailability of this brand’s 300 mcg formulation.

How it works

Melatonin is a hormone that helps regulate your sleep-wake cycle. Data not available on the specific mechanism of this product. For context, calcium, an unrelated mineral, supports bone mineralization and neuromuscular relaxation [NIH ODS].

Safety profile

Data not available on adverse events specific to Sundown Naturals Melatonin 300 mcg. The total FDA adverse event reports across all supplements is 592059 [FDA data]. High calcium intake, a different ingredient, is associated with risks such as constipation, nausea, and abnormal heart rhythms [NIH ODS].

Our recommendation

Data not available to make a specific recommendation for Sundown Naturals Melatonin 300 mcg. Consult your healthcare provider before starting any new supplement, especially for sleep support.

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