EVIDENCE-BASED SUPPLEMENT SCORING
4.8/10
WEAK

Confidence: 58%

NOW Foods Supplements, Zinc (Zinc Gluconate) 50 mg, Supports Enzyme Functions*, Immune Support*, 250 Tablets

NOW Foods Supplements, Zinc (Zinc Gluconate) 50 mg, Supports Enzyme Functions*, Immune Support*

B000MGR1CM

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Decision summary

SKIPWEAK

Not a strong option overall. The product is materially held back by weaker ingredient form quality.

Best for

Only budget-focused buyers with flexible standards.

Consider another option if

You care a lot about label clarity and want fewer unknowns.

Score breakdown

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

Dosage quality

4.0/10

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 zinc: chemical form not specified on label.

Strengths

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

Weaknesses

Zinc: chemical form not specified on label

Final verdict

Not a strong option overall. The product is materially held back by weaker ingredient form quality.

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

This is a limiting factor: Dose is higher than typically recommended ranges. The label does not specify the form, so absorption quality cannot be verified.

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

NOW Foods Supplements, Zinc (Zinc Gluconate) 50 mg, Supports Enzyme Functions*, Immune Support*, 250 Tablets

NOW Foods Supplements, Zinc (Zinc Gluconate) 50 mg, Supports Enzyme Functions*, Immune Support*, 250 Tablets

Warnings & notes

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

i

Zinc form is not clearly declared

Exact ingredient form is not disclosed on the label.

Info

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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