BioStacks
MyProtein

Impact Pre-Workout

Powder · 1 scoop (11.5g) · 21 servings

MyProtein · £11.49

Best for

Energy

Ingredients (14)

Caffeine

100%

Dose

150 mg

Target

100–400 mg

Form

—

Vitamin B6

100%

Dose

1.4 mg

Target

1.3–25 mg

Form

—

Taurine

100%

Dose

1000 mg

Target

1000–3000 mg

Form

—

L-Tyrosine

100%

Dose

1000 mg

Target

500–2000 mg

Form

—

Vitamin B2

6%

Dose

1.4 mg

Target

25–100 mg

Form

—

Other Ingredients (6)

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.

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Beet ColorColorant

Natural red-pink colorant from dehydrated beets or beet juice; the pigment is betanin

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.

Fatty AcidsCarrier

Fatty acids derived from vegetable triglycerides, used as lipid carriers in enhanced-absorption vitamin formulations

Sea SaltFlavor

Basic food-grade salt used for taste in supplements

How to Take It

Best taken in the morning

Contains Caffeine, which is stimulating — keep it to the morning. Take it with food — the niacin in it is what makes this kind of product feel nauseating on an empty stomach.

With food
Keep it away from protein-heavy meals

On the label

Mix 11.5g (approx. 1 scoop) to 250-350ml of water or juice, shake and consume before exercise. Consume once daily. Powder settles over time, we recommend weighing for most accurate measure. High caffeine content ( 150 mg/serving). Not recommended for children or pregnant or breast-feeding women. Sunset Yellow may have an adverse effect on activity and attention in children.

General guidance based on the ingredients, not a substitute for the label or your doctor.

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and 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. clinical 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.

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