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21st Century D3

Backed by 26 studies

Overall grade based on research across 7 ingredients.

A
81out of 100Grade A
Research evidence score

Weighed against 26 published studies · led by Vitamin C

Strong pick. Vitamin C, Magnesium and Zinc (+3 more) have real research behind them (18 studies reviewed), but Hyaluronic Acid doesn't have enough studies yet.

Based on the ingredients we could read from this scan. A full label may include more — like added sugars, colorings or other ingredients — than we captured here.

How the ingredients work together

Known interactions from published nutrition research — separate from the evidence grade.

66 of 6 nutrients at a meaningful dose (≥20% Daily Value).
Zinc balanced with CopperWork together

Long-term zinc supplementation depletes copper; including copper alongside zinc is the textbook-correct formulation.

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Ingredient breakdown

A
Vitamin CSupports immune function and antioxidant defense
Research: Established essential nutrientDaily Value: 111%Dose: 100 mgEvidence strength: Established nutrient — this product provides a meaningful dose
B
MagnesiumImproves sleep quality and muscle recovery
Research: Established essential nutrientDaily Value: 48%Dose: 200 mgEvidence strength: Established nutrient — a solid dose in this product
A
ZincSupports immune function and testosterone
Research: Established essential nutrientDaily Value: 136%Dose: 15 mgEvidence strength: Established nutrient — this product provides a meaningful dose
A
CopperSupports iron metabolism and connective tissue
Research: Established essential nutrientDaily Value: 56%Dose: 500 mcgEvidence strength: Established nutrient — this product provides a meaningful dose
A
ManganeseSupports bone formation and antioxidant defense
Research: Established essential nutrientDaily Value: 217%Dose: 5 mgEvidence strength: Established nutrient — this product provides a meaningful dose
A
MolybdenumSupports enzyme function and detoxification
Research: Established essential nutrientDaily Value: 489%Dose: 220 mcgEvidence strength: Established nutrient — this product provides a meaningful dose
D
Hyaluronic AcidImproves skin hydration and plumpness
Research direction: InconclusiveEvidence: 18 studiesDose: 80 mgEvidence strength: Weak - research is split or limited

This summary describes only the ingredients and the research behind them — it is not a judgment of the product or its marketing. Grades reflect the weight of published evidence cross-referenced against 350M+ research papers. How we grade →

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