NutraBio

NutraBio built its entire brand identity around the thing most pre-workouts avoid: telling you exactly what's in the tub. No proprietary blends, no filler, no 40-serving tubs that are actually 20 — just a label you can trust at face value.

PRE is explicitly marketed as containing "absolutely NO proprietary blends," manufactured in NutraBio's own cGMP facility, with the 2025 reformulation clinically dosing beta-alanine, creatine, caffeine, and electrolytes (NutraBio about, retailer listing, Amazon). Every active is disclosed at full label value, with an honest 20 servings per tub (independent review).

NutraBio publishes batch-level third-party COAs searchable by lot number through its own CheckMySupps portal, and its whey isolate carries independent amino-spiking-free certification from STACK3D (CheckMySupps, NutraBio, NutraBio lab results).

No recalls, lawsuits, or enforcement actions found. It doesn't carry NSF Certified for Sport or Informed Sport on the pre-workout specifically, and price runs $2.30-$2.50/serving — high for the category (price analysis). Compared to Cellucor C4's hidden-dose "Explosive Energy Blend," NutraBio is the clear pick if full-disclosure dosing matters to you.