Confidence: 75%
Decision summary
Not a strong option overall. The product is materially held back by weaker ingredient form quality.
Best for
Buyers comparing price and availability and okay with a middle-of-the-pack option.
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
3.8/10Dosing 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).
Explore next
Vitamin-d: high-bioavailability form declared (Cholecalciferol (D3)). The main limitation is that critical safety flag limits final score.
Strengths
Weaknesses
Final verdict
Not a strong option overall. The product is materially held back by weaker ingredient form quality.
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 drag on the formula: Dose is higher than typically recommended ranges.
Scientific evidence
Zimmermann et al. review on iodine deficiency and thyroid function in human populations
Endocrine Reviews • 2009
PMID: 19357404.0
Bath et al. maternal iodine status and offspring cognitive outcomes (ALSPAC cohort)
Lancet • 2013
PMID: 23683674.0
ℹ Dose is within established clinical ranges, but lacks direct studies
One of the weaker points: Dose is higher than typically recommended ranges. The declared form supports strong absorption.
Clinical dosing guidance
Based on established dosing ranges used in clinical practice.
✔ Clinically effective dose with strong supporting evidence
A clear drag on the formula: Dose is higher than typically recommended ranges. The label does not specify the form, so absorption quality cannot be verified.
Scientific evidence
Cockayne et al. meta-analysis vitamin K2 and bone mineral density
Archives of Internal Medicine • 2006
PMID: 16801507.0
Geleijnse et al. Rotterdam study on vitamin K intake and cardiovascular mortality
Journal of Nutrition • 2004
PMID: 15514282.0
⚠ 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
Martineau et al. meta-analysis vitamin D supplementation and respiratory infections
BMJ • 2017
PMID: 26864360.0
Bischoff-Ferrari et al. meta-analysis vitamin D fracture prevention
BMJ • 2009
PMID: 20198382.0
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.
Vitamin D dose looks below clinically effective levels
Declared amount falls below ranges used in human trials.
Vitamin K2 form is not clearly declared
Exact ingredient form is not disclosed on the label.
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.
See the best Vitamin D3 supplements ranked with the same methodology, or keep exploring the database.
