OL Olympian Labs Melatonin 3 mg

Our assessment

The evidence shows that this product contains 3 mg of melatonin per serving, which is a common dosage for sleep support. Data on melatonin itself is not provided here, but the broader supplement safety context is important. We have data on calcium, which is a separate ingredient, and a total of 592,059 adverse event reports across all supplements tracked by the FDA [FDA data].

How it works

Melatonin is a hormone that your body naturally produces to regulate your sleep-wake cycle. Taking a 3 mg supplement can help signal to your body that it is time to sleep. The provided data does not include a specific mechanism for melatonin, but for context, calcium—a different nutrient—works in bone mineralization and neuromuscular relaxation [NIH ODS]. This product, however, is formulated for melatonin's sleep-related effects.

Safety profile

Data on specific side effects for this melatonin product is not available. However, based on the broader FDA database, there were 592,059 total adverse event reports for all supplements [FDA data]. For comparison, high calcium intakes can cause side effects including constipation, nausea, and abnormal heart rhythms [NIH ODS]. You should always be cautious with supplements and consult a healthcare provider before starting a new regimen.

Our recommendation

Start with the lowest effective dose. For melatonin, 3 mg is a moderate starting point, but some individuals may find 1 mg or 0.5 mg sufficient. Do not take this product if you are pregnant, nursing, or have an autoimmune condition without first speaking to your doctor. Data on long-term safety for melatonin is not available in the provided information, so use it only as needed for short-term 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