BioStacks
NOW

Pre-Workout Advanced Energy

Powder · 1 1/2 Level Tablespoons (Approx. 18 G) · 33 servings · $1.61/serving

59 / 100Average

Best for

Score Breakdown

Formulation
73
Safety
80
Final score
59/100

Ingredients (6)

L-Carnitine

100%

Dose

1000 mg

Target

500–2000 mg

Form

Natural Caffeine

100%

Dose

200 mg

Target

100–400 mg

Form

Betaine Anhydrous

100%

Dose

2500 mg

Target

2500–6000 mg

Form

Creatine Monohydrate

67%

Dose

2 g

Target

3–5 g

Form

Premium

Beta-Alanine

63%

Dose

2000 mg

Target

3200–6400 mg

Form

Other Ingredients (10)

ErythritolSweetener

Witkowski et al. 2023 (Nature Medicine, PMID 36849732) reported elevated plasma erythritol associated with major adverse cardiovascular events (MACE) in two cohorts (n=4,000+), with in-vitro and ex-vivo evidence of enhanced platelet aggregation. Replication is ongoing; FDA and EFSA have not changed their safety positions, but the signal is real and the additive is purely cosmetic. Better-established concern: GI tolerance — single doses above ~50 g cause osmotic diarrhea. Lower threshold for children.

MaltodextrinBinder

Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.

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.

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Stevia ExtractSweetener

Zero-calorie natural sweetener extracted from the leaves of Stevia rebaudiana

Citric AcidAcidulant

Natural acid derived from citrus fruits

Guar GumThickener

Natural thickener derived from guar beans

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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.