SuppScoreLab
SuppScoreLab
EVIDENCE-BASED SUPPLEMENT SCORING
6.9/10
AVERAGE

Confidence: 100%

American Standard Supplements Zinc 100mg, Vitamin C 1000mg, and Vitamin D3 5000 IU (125mcg) Per Serving - Gluten Free, Non-GMO, 120 Capsules, 60 Servings

American Standard Supplements Zinc 100mg, Vitamin C 1000mg, and Vitamin D3 5000 IU (125mcg) Per Serving - Gluten Free, Non-GMO, 60 Servings

B08K53B4VS

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Decision summary

CONSIDERAVERAGE

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

Compare top Zinc picks

Best for

Buyers comparing price and availability and okay with a middle-of-the-pack option.

Consider another option if

You want one of the best-absorbed options in this category.

Score breakdown

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

Dosage quality

4.3/10

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).

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Immune health

Ingredient guide

Zinc

Score summary

Vitamin-d: high-bioavailability form declared (Cholecalciferol (D3)). The main limitation is that critical safety flag limits final score.

Strengths

Vitamin-d: high-bioavailability form declared (Cholecalciferol (D3))

Weaknesses

Critical safety flag limits final score
Vitamin-d: below clinically studied range

Final verdict

A middling option. It may be usable, but weaker safety 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.

✔ Clinically effective dose with strong supporting evidence

A clear strength: Dose is strong and within effective ranges. The declared form is acceptable, but not among the best-absorbed options.

Scientific evidence

Meta-analysis

Hemila & Chalker Cochrane review vitamin C and common cold duration

Cochrane Database of Systematic Reviews • 2013

PMID: 23440782.0

RCT

Padayatty et al. RCT on vitamin C antioxidant capacity in healthy adults

Journal of the American College of Nutrition • 2001

PMID: 11684527.0

⚠ Strong evidence exists, but dose may be too low to be effective

A clear drag on the formula: Dose is likely below clinically useful levels. The declared form supports strong absorption.

Scientific evidence

Meta-analysis

Martineau et al. meta-analysis vitamin D supplementation and respiratory infections

BMJ • 2017

PMID: 26864360.0

Meta-analysis

Bischoff-Ferrari et al. meta-analysis vitamin D fracture prevention

BMJ • 2009

PMID: 20198382.0

✔ Clinically effective dose with strong supporting evidence

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

American Standard Supplements Zinc 100mg, Vitamin C 1000mg, and Vitamin D3 5000 IU (125mcg) Per Serving - Gluten Free, Non-GMO, 120 Capsules, 60 Servings

American Standard Supplements Zinc 100mg, Vitamin C 1000mg, and Vitamin D3 5000 IU (125mcg) Per Serving - Gluten Free, Non-GMO, 120 Capsules, 60 Servings

6.9/10
View on Amazon →

Warnings & notes

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

!

Safety-related concerns may affect suitability

This product may deserve extra caution depending on context.

Warning
!

Vitamin D 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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