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Melatonin works for jet lag and shift work. But 5mg is 10x the physiologically relevant dose, and chronic use can suppress natural production. Overprescribed and underdiscussed.
The low safety score reflects the oversized dose (5mg) that exceeds physiological relevance by 10x. Melatonin is not a sleep supplement in the traditional sense -- it is a circadian signal. Using 5mg nightly can dysregulate the circadian system. The product is cheap and melatonin 'works,' but the dose is a problem. Natrol is not alone in this -- the entire melatonin market is overdosed.
Melatonin has strong evidence for circadian rhythm disorders (jet lag, shift work) and moderate evidence for sleep onset latency reduction. However, the effective dose is 0.3-0.5mg -- ten times lower than this product. Doses above 1mg do not improve efficacy and may cause next-day grogginess, vivid dreams, and suppression of endogenous melatonin production. The time-release mechanism has limited evidence for superiority over immediate release.
| Ingredient | Dose | Verdict |
|---|---|---|
| Melatonin | 5mg | Underdosed |
| Vitamin B6 | 10mg | Unnecessary |
Why the true cost is higher
This product has 1 underdosed and 0 unknown-dose ingredients. To actually get clinically effective doses, you would need approximately 3 servings per day -- making your real cost $0.27 per effective dose instead of the listed $0.09.
Save $5.10/month (63%)
by switching to Natrol Melatonin 1mg
5mg is 10-16x the effective physiological dose (0.3-0.5mg). Chronic use may suppress natural melatonin production. Time-release mechanism has limited evidence advantage. May cause next-day drowsiness and vivid dreams. Not addressing root causes of sleep issues.
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