Vitamin World Low Dose Melatonin 200 mcg

Our assessment

The evidence shows that a 200 mcg (0.2 mg) dose of melatonin is a very low, conservative amount. For context, the standard low dose used in many clinical studies is 0.5 mg to 5 mg per day [NIH ODS]. This product is likely intended to support sleep onset with a minimal amount of the hormone, which may be appropriate for individuals who are sensitive to higher doses or who want a gentle nudge toward sleepiness. Data not available on specific clinical outcomes for this exact dose.

How it works

Melatonin is a natural hormone your brain produces in response to darkness. It helps regulate your circadian rhythm — your internal 24-hour clock — signaling to your body that it is time to prepare for sleep [NIH ODS]. A 200 mcg dose works by gently boosting your body's own melatonin levels, which can help you fall asleep faster, especially if your natural production is low due to age, shift work, or jet lag [NIH ODS].

Safety profile

FDA received 2,046 adverse event reports for melatonin across all doses. For a 200 mcg dose specifically, side effects are expected to be minimal, though data not available on report counts for this exact dose. General side effects from melatonin can include daytime drowsiness, headache, dizziness, and nausea [FDA data]. Because this is a very low dose, the risk of these effects is lower than with higher doses, but you should still monitor how you feel [FDA data].

Our recommendation

This 200 mcg dose is an excellent starting point if you are new to melatonin or have experienced grogginess from higher doses. Take it 30 to 60 minutes before your desired bedtime. If you do not notice a benefit after one to two weeks, you may consider a slightly higher dose, such as 0.5 mg or 1 mg, but consult your healthcare provider first [NIH ODS]. Do not exceed recommended use without medical guidance.

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