EVIDENCE-BASED SUPPLEMENT SCORING
7.2/10
SOLID OPTION

Confidence: 80%

21st Century Healthcare Zinc Citrate Tablets 50mg, 60 Count

21st Century Healthcare Zinc Citrate Tablets 50mg

B0915Y11W8

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Decision summary

CONSIDERSOLID OPTION

A middling option. It may be usable, but weaker dosing makes better alternatives worth comparing.

Best for

Buyers who want a solid pick and can tolerate a couple of trade-offs.

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

3.7/10

Dosing looks weaker than ideal

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

The supporting evidence profile is relatively strong. The main limitation is that calcium: below clinically studied range.

Strengths

The supporting evidence profile is relatively strong
The formula stays relatively clean on excipients
The formulation has a clearer overall purpose

Weaknesses

Calcium: below clinically studied range

Final verdict

A middling option. It may be usable, but weaker dosing makes better alternatives worth comparing.

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.

⚠ Strong evidence exists, but dose is above the upper dose range

Dose is above the upper dose range. This is a limiting factor: Dose is higher than typically recommended ranges. The declared form is acceptable, but not among the best-absorbed options.

Scientific evidence

Meta-analysis

Singh & Das Cochrane review zinc for common cold

Cochrane Database of Systematic Reviews • 2011

PMID: 22553186.0

RCT

Prasad et al. RCT zinc supplementation and testosterone in elderly men

Nutrition • 1996

PMID: 8875519.0

⚠ 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 declared form is acceptable, but not among the best-absorbed options.

Scientific evidence

Meta-analysis

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

BMJ • 2007

PMID: 17720017.0

21st Century Healthcare Zinc Citrate Tablets 50mg, 60 Count

21st Century Healthcare Zinc Citrate Tablets 50mg, 60 Count

Warnings & notes

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

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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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