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Melatonin 20 mg

NaturesPlus
4.7
★ ★ ★ ★ ★
(1270 ratings)
Melatonin 20 mg
Product Image
Score62
A transparent but overly aggressive 20 mg tablet. The megadose and lack of special delivery make it unsuitable as a general sleep option.
How scoring works
Quantity:90 Tablet(s) • (90 servings)
Goals:
Sleep Support

Score 62

A transparent but overly aggressive 20 mg tablet. The megadose and lack of special delivery make it unsuitable as a general sleep option.
How scoring works

Also available as

3 options
1.00mg • 90 Tablet(s) servings Melatonin 1 mg • 90 Tablet(s) • 90 servings $6.33 ($0.07 per serving) 3.00mg • 90 Tablet(s) servings Melatonin 3 mg • 90 Tablet(s) • 90 servings $8.46 ($0.09 per serving) 5.00mg • 90 Tablet(s) servings Melatonin 5 mg • 90 Tablet(s) • 90 servings $9.73 ($0.10 per serving)
$18.66($0.20 per serving)
iHerb
$ 18.66
Pure Formulas
$ 18.66
Vitacost
$ 18.85
Amazon
$ 18.66
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Analysis

Melatonin is directly relevant to circadian timing and sleep onset, but 20 mg is far above what many people need. More melatonin does not reliably produce better sleep and can worsen next-day tolerability.

The product clearly discloses one active and avoids filler blends. Its hard immediate-release tablet provides no overnight-release feature that might otherwise justify a specialized formula.

Pronounced sleepiness, vivid dreams, headache, and impaired morning alertness are practical concerns at this amount. Routine use is difficult to justify without specific professional direction.

Who is it for
  • Adults following specific professional direction
  • Experienced high-dose melatonin users
  • People who require a clear single-ingredient label
Best for
  • Professionally supervised high-dose use
  • Sleep onset rather than maintenance
  • Users avoiding proprietary blends

Pros

  • Fully disclosed single active
  • Simple one-tablet format
  • Good qualitative purchase value

Cons

  • 20 mg is excessive for routine use
  • No sustained-release feature
  • Fixed tablet limits lower-dose control

Warnings

  • The 20 mg amount may cause pronounced next-day sleepiness, vivid dreams, or headache
  • Do not drive or perform hazardous tasks until effects are known
  • Discuss routine use of this megadose with a qualified professional

Nutrient quality

49 Lower impact

The melatonin megadose is poorly balanced for routine sleep support. Basic tablet delivery adds no specialized onset or maintenance support.

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Ingredient transparency

82 Highest impact

Active amounts and the basic serving format are clear without hidden blends. Full directions, source purity, and inactive ingredients remain incomplete.

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Customer satisfaction

68 High impact

The supplied aggregate satisfaction signal is favorable and has some support from its response volume. Specific experience details are absent, so complaint patterns and purpose fit cannot be confirmed.

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Value for money

46 Lower impact

The formula offers limited value beyond basic melatonin delivery. Dose or transparency weaknesses make better-balanced alternatives more appealing.

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Report analysis

Goals

Sleep Support
Sleep Support
Impact
Moderate effect
A+ Goal FitF Strength of SupportF CoverageB Formula Quality
Melatonin · 20 mg

Melatonin is highly relevant to circadian timing and sleep onset, but the very high amount is poorly matched to physiological use. A much larger dose does not reliably add sleep benefit and raises tolerability concerns.

The single-ingredient label is clear and free from padding. One full tablet may cause pronounced next-day sleepiness, and the hard tablet offers no sustained-release feature to justify the excessive amount.

Study evidence
Melatonin Supportive 181 studies

Ingredients

IngredientAmount per serving
Melatonin
20 mg
Gluten Free Adults 18–50 Vegan Dairy Free Women Vegetarian
Report overview
Melatonin · 20 mg OverallScore36
F Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyC Value

The hard tablet may act more slowly and provides no sustained-release support. A single tablet delivers a 20 mg megadose that raises the practical risk of daytime sleepiness. Serving cost is moderately above the collection median, and no independent purity certification is disclosed.

View ingredientView products
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82 Performance

Melatonin 3 mg

NOW
Melatonin directly supports sleep timing, and the moderate 3 mg melatonin amount is fully disclosed; its dose and delivery offer a clearer option when the original uses a very high amount with greater next-day effect risk. The liquid or dissolving delivery may support prompt use around bedtime; Melatonin may cause next-day drowsiness, and combining it with alcohol or other sedatives can increase impairment.
85 Performance

Melatonin Lozenges 3 mg

Life Extension
The melatonin amount is well aligned with practical sleep support without being unnecessarily aggressive; its dose and delivery offer a clearer option when the original uses a very high amount with greater next-day effect risk. The focused formula provides a straightforward option for sleep onset; Melatonin may cause next-day drowsiness, and combining it with alcohol or other sedatives can increase impairment.
80 Performance

Melatonin 3 mg

Nature Made
A modest melatonin amount provides well-balanced routine sleep support; its dose and delivery offer a clearer option when the original uses a very high amount with greater next-day effect risk. Basic tablet delivery and a low-value calcium addition are the main limitations; Melatonin may cause next-day drowsiness, and combining it with alcohol or other sedatives can increase impairment.
87 Budget

Melatonin 3 mg

NOW
A practical melatonin amount in a simple capsule offers focused sleep-onset support and a long supply; the lower serving cost improves economy when the original uses a very high amount with greater next-day effect risk. Conventional release does not cover overnight maintenance, but the exceptionally low serving cost is compelling; Melatonin may cause next-day drowsiness, and combining it with alcohol or other sedatives can increase impairment.
82 Budget

Melatonin 3 mg

21st Century
A modest melatonin amount provides well-balanced routine sleep support; the lower serving cost improves economy when the original uses a very high amount with greater next-day effect risk. Basic tablet delivery and a low-value calcium addition are the main limitations; Melatonin may cause next-day drowsiness, and combining it with alcohol or other sedatives can increase impairment.
90 Budget

Fast-Dissolve Melatonin 3 mg Artificial Strawberry Flavor

Spring Valley
A physiologically aligned amount and fast-dissolve delivery create a strong sleep-onset formula; the lower serving cost improves economy when the original uses a very high amount with greater next-day effect risk. The very low serving cost is compelling, although no sustained release supports sleep maintenance; Melatonin may cause next-day drowsiness, and combining it with alcohol or other sedatives can increase impairment.
85 Value

Melatonin 3 mg

NOW
Melatonin directly supports sleep timing, and the moderate 3 mg melatonin amount is fully disclosed; the quality-to-cost balance is favorable when the original uses a very high amount with greater next-day effect risk. The liquid or dissolving delivery may support prompt use around bedtime; Melatonin may cause next-day drowsiness, and combining it with alcohol or other sedatives can increase impairment.
88 Value

Melatonin 3 mg Fast Dissolve Strawberry Natural Flavor

Natrol
The melatonin amount fits a practical sleep-support range; the quality-to-cost balance is favorable when the original uses a very high amount with greater next-day effect risk. Fast-dissolve delivery supports sleep initiation without overnight release; Melatonin may cause next-day drowsiness, and combining it with alcohol or other sedatives can increase impairment.
90 Value

Melatonin 1.0 mg Orange Flavor

Source Naturals Sleep Science
The 1 mg amount is well aligned with low-dose sleep support; the quality-to-cost balance is favorable when the original uses a very high amount with greater next-day effect risk. The dissolving format may support quicker onset but not overnight release; Melatonin may cause next-day drowsiness, and combining it with alcohol or other sedatives can increase impairment.
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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Meta-analysis: melatonin for the treatment of primary sleep disorders.
    Ferracioli-Oda E; Qawasmi A; Bloch MH · PloS one · 2013
    Meta-analysis1,683 participants19 studies pooledSleep Support forMelatonin
  2. Efficacy of melatonin with behavioural sleep-wake scheduling for delayed sleep-wake phase disorder: A double-blind, randomised clinical trial.
    Sletten TL; Magee M; Murray JM; Gordon CJ; Lovato N; Kennaway DJ; Gwini SM; Bartlett DJ; Lockley SW; Lack LC; Grunstein RR; Rajaratnam SMW; Delayed Sleep on Melatonin (DelSoM) Study Group · PLoS medicine · 2019
    Randomized trial116 participantsSleep Support forMelatonin
  3. Melatonin treatment for age-related insomnia.
    Zhdanova IV; Wurtman RJ; Regan MM; Taylor JA; Shi JP; Leclair OU · The Journal of clinical endocrinology and metabolism · 2001
    Randomized trial30 participantsSleep Support forMelatonin
  4. The Effectiveness of Melatonin for Sleep Disturbances in Parkinson' Disease: Systematic Review and Meta-Analysis.
    Yousef O; Abouelmagd ME; Khaddam H; Shbani A; Yousef R; Meshref M; Hanafi I · Journal of sleep research · 2026
    Meta-analysis409 participants8 studies pooledSleep Support forMelatonin
  5. Nightly treatment of primary insomnia with prolonged release melatonin for 6 months: a randomized placebo controlled trial on age and endogenous melatonin as predictors of efficacy and safety.
    Wade AG; Ford I; Crawford G; McConnachie A; Nir T; Laudon M; Zisapel N · BMC medicine · 2010
    Randomized trial791 participantsSleep Support forMelatonin
  6. Effects of exogenous melatonin on sleep: a meta-analysis.
    Brzezinski A; Vangel MG; Wurtman RJ; Norrie G; Zhdanova I; Ben-Shushan A; Ford I · Sleep medicine reviews · 2005
    Meta-analysis284 participants8 studies pooledSleep Support forMelatonin