EVIDENCE-BASED SUPPLEMENT SCORING
8.1/10
SOLID OPTION

Confidence: 66%

GNC Melatonin 3mg Supplement, Supports Restful Sleep, 120 Servings

GNC Melatonin 3mg Supplement, Supports Restful Sleep, 120 Servings

B008HOL44W

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Decision summary

CONSIDERSOLID OPTION

A solid product, but not a clean win. The main trade-off is weaker formulation coherence.

Best for

People prioritizing high absorption and overall formula quality.

Consider another option if

You want fewer compromises on formulation quality.

Score breakdown

Tap a module to see what it measures. A 0 can reflect missing disclosure, not just a negative result.

Dosage quality

8.5/10

Strong dosing for the intended goal

Checks whether labeled ingredient amounts fall within clinically studied ranges (not just regulatory minimums). Low/0 can reflect under-dosing or missing amounts (e.g., proprietary blends).

Score summary

Melatonin: dose within clinically studied range (evidence A). The main limitation is that formula coherence is weak: diluted, decorative or overly complex.

Strengths

Melatonin: dose within clinically studied range (evidence A)
Melatonin: high-bioavailability form declared (Melatonin)

Weaknesses

Formula coherence is weak: diluted, decorative or overly complex
Vitamin-b6: below clinically studied range
Calcium: below clinically studied range

Final verdict

A solid product, but not a clean win. The main trade-off is weaker formulation coherence.

Ingredient Analysis & Evidence

A closer look at the main ingredients, how they influence the score, and the supporting evidence when available. Tap any ingredient to expand.

✔ Clinically effective dose with strong supporting evidence

Dose is within the optimal/effective range. A clear strength: Dose is strong and within effective ranges. The declared form supports strong absorption.

Scientific evidence

Meta-analysis

Ferracioli-Oda et al. meta-analysis melatonin and sleep disorders

PLOS ONE • 2013

PMID: 23691095.0

ℹ At the minimum effective range, but below the optimal dose with moderate supporting evidence

Dose meets the minimum effective range, but is below the optimal dose used for stronger effects. One of the weaker points: Dose is likely below clinically useful levels. The declared form is acceptable, but not among the best-absorbed options.

Scientific evidence

RCT

Bryan et al. RCT on B vitamins and cognitive function in older adults

American Journal of Clinical Nutrition • 2002

PMID: 16920179.0

⚠ Strong evidence exists, but dose is below effective threshold

Dose is below the minimum effective threshold. A clear drag on the formula: Dose is likely below clinically useful levels. The label does not specify the form, so absorption quality cannot be verified.

Scientific evidence

Meta-analysis

Tang et al. meta-analysis calcium supplementation and fracture risk

BMJ • 2007

PMID: 17720017.0

GNC Melatonin 3mg Supplement, Supports Restful Sleep, 120 Servings

GNC Melatonin 3mg Supplement, Supports Restful Sleep, 120 Servings

Warnings & notes

Important label or formulation details that may affect how this product should be interpreted.

Formula design looks less coherent than stronger alternatives

The formulation appears less focused than better-built options.

Note
!

Vitamin B6 dose looks below clinically effective levels

Declared amount falls below ranges used in human trials.

Warning
!

Calcium dose looks below clinically effective levels

Declared amount falls below ranges used in human trials.

Warning

Methodology

Read our methodology overview to understand how SuppScoreLab combines multiple scientific dimensions into one practical score.

View methodology →

This evaluation is based on the product label and declared Supplement Facts available at review time. It does not verify laboratory-tested composition, purity, or batch-level quality. This content is educational and not medical advice. Consult a qualified healthcare professional for personal health decisions. Affiliate disclosure: SuppScoreLab may earn a commission from qualifying Amazon links.

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