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Metabolic Nutrition E.S.P. Pre-Workout Watermelon

Backed by 3 studies

Overall grade based on research across 7 ingredients.

B
69out of 100Grade B
Research evidence score

Weighed against 3 published studies · led by Caffeine

Solid pick. Magnesium, Niacin and Vitamin B6 (+1 more) have real research behind them, but Caffeine doesn't have enough studies yet, Calcium and Potassium are only a light dose here.

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.

44 of 6 nutrients at a meaningful dose (≥20% Daily Value) — the other 2 are present at low levels.
Magnesium + B6Work together

B6 supports cellular magnesium uptake; the combination is better studied than magnesium alone for some uses.

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Ingredient breakdown

D
CaffeineImproves alertness and cognitive performance
Research direction: Mixed findingsEvidence: 3 studiesEvidence strength: Weak - research is split or limited
C
CalciumSupports bone density and muscle contraction
Research: Established essential nutrientDaily Value: 7.7%Dose: 100 mgEvidence strength: Established nutrient — only a small dose in this product
C
MagnesiumImproves sleep quality and muscle recovery
Research: Established essential nutrientDaily Value: 24%Dose: 100 mgEvidence strength: Established nutrient — a modest dose in this product
D
PotassiumSupports blood pressure regulation and muscle function
Research: Established essential nutrientDaily Value: 2.1%Dose: 100 mgEvidence strength: Established nutrient — only a token dose in this product
A
NiacinSupports cholesterol metabolism and cellular energy
Research: Established essential nutrientDaily Value: 63%Dose: 10 mgEvidence strength: Established nutrient — this product provides a meaningful dose
A
Vitamin B6Supports energy metabolism and neurotransmitter synthesis
Research: Established essential nutrientDaily Value: 124%Dose: 2.11 mgEvidence strength: Established nutrient — this product provides a meaningful dose
A
Vitamin B12Supports energy and nerve function
Research: Established essential nutrientDaily Value: 5208%Dose: 125 mcgEvidence 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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