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Optimum Nutrition Opti-Men

8 established essential nutrients

Graded on the nutrient adequacy of 8 labeled ingredients.

A
83out of 100Grade A
Research evidence score

Graded on 8 established essential nutrients · led by Retinol

Strong pick. Retinol, Vitamin C and Vitamin D3 (+5 more) have real research behind them. Check the flagged warning before you buy.

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.

88 of 8 nutrients at a meaningful dose (≥20% Daily Value).
Vitamin C + Vitamin EWork together

Vitamin C regenerates oxidized vitamin E, recycling its antioxidant capacity.

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Ingredient breakdown

A
RetinolSupports vision and immune function
Research: Established essential nutrientDaily Value: 333%Dose: 3000 mcgEvidence strength: Established nutrient — this product provides a meaningful dose
A
Vitamin CSupports immune function and antioxidant defense
Research: Established essential nutrientDaily Value: 333%Dose: 300 mgEvidence strength: Established nutrient — this product provides a meaningful dose
A
Vitamin D3Supports bone health and immune function
Research: Established essential nutrientDaily Value: 188%Dose: 37.5 mcgEvidence strength: Established nutrient — this product provides a meaningful dose
A
Vitamin EProtects against oxidative damage
Research: Established essential nutrientDaily Value: 893%Dose: 134 mgEvidence strength: Established nutrient — this product provides a meaningful dose
A
Vitamin KSupports blood clotting and bone metabolism
Research: Established essential nutrientDaily Value: 63%Dose: 75 mcgEvidence strength: Established nutrient — this product provides a meaningful dose
A
ThiamineSupports energy metabolism and nerve function
Research: Established essential nutrientDaily Value: 6250%Dose: 75 mgEvidence strength: Established nutrient — this product provides a meaningful dose
A
RiboflavinSupports cellular energy production and antioxidant defense
Research: Established essential nutrientDaily Value: 5769%Dose: 75 mgEvidence strength: Established nutrient — this product provides a meaningful dose
C
NiacinSupports cholesterol metabolism and cellular energy
Research: Established essential nutrientDaily Value: 469%Dose: 75 mgEvidence strength: Established nutrient — this product provides a meaningful dose

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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