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GNC

Pro Performance Pre-Workout (Tropical Fruit Punch)

1 Scoop (11.3g) · 30 servings

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What it does

A combination of 10 label ingredients.

β-Alanine

Form not confirmedGrade —

Label lists Beta-Alanine (1.6 g). Benefit information is limited.

TMG (Trimethylglycine)

Form not confirmedGrade —

Label lists Betaine Anhydrous (2.5 g). Benefit information is limited.

MuscleHydrationEnergy
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Ingredients (10)

IngredientDoseTarget/referenceForm

Other ingredients

SucraloseSweetener

Dose context matters. As a trace excipient in a tablet coating or capsule, the amount is minimal and not a meaningful concern. The evidence below applies to the gram-level intakes typical of sweetened protein powders, pre-workouts, and drink mixes: a 2022 human trial (Suez et al., Cell) showed sucralose disrupts gut bacteria and worsens blood sugar control in healthy adults, and a 2023 study (Schiffman et al.) found that sucralose-6-acetate — a compound formed when sucralose is digested — was genotoxic to human cells in vitro. It remains an artificial sweetener with no nutritional purpose.

Natural FlavorsFlavor

Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Calcium SilicateAnti-caking

Inorganic compound used as an anti-caking and flow agent in powdered supplements

Citric AcidAcidulant

Natural acid derived from citrus fruits

Lab testing

How to take it

With food
Keep it away from iron-rich meals
Space it a couple of hours from Iron and Calcium

On the label

Take 1 scoop daily.

Price check

$24.99

$0.83 / serving

$20$50$100

Cheaper than 81% of 165 muscle supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

Not medical advice. Consult your healthcare professional.

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