This product contains 4 disputed ingredients: L-Isoleucine, L-Valine, Ginseng, Maca Root. Evidence is mixed or doses are undisclosed — see Ingredients below for details.
Pre-Workout
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Used for: endurance athletes
Summary
Just Ingredients Pre-Workout is a performance supplement.
Strengths
- Batch-tested for banned substances (NSF Certified for Sport).
- Clear, complete labeling.
Weaknesses
- Limited research support for key ingredients.
Why it scores 63
How scoring works →Independent analysis No brand partnerships
The details
Cross-referenced with PubMed & Examine.com
Raises nitric oxide and may modestly improve high-intensity performance at 3–6g; lower doses are less studied.
Raises muscle carnosine, which buffers acid; around 3–6g a day for at least 4 weeks improves efforts of roughly 1–4 minutes. Harmless tingling is common; split doses reduce it.
The amino acid that most strongly switches on muscle protein building; about 2–3g per meal, usually from protein, is enough.
A branched-chain amino acid; it adds little on top of an adequate protein intake.
A branched-chain amino acid; it adds little on top of an adequate protein intake.
May reduce exercise-related oxidative stress and modestly improve endurance performance; results are mixed.
Ginseng-type herbs are studied for energy, stress and recovery; results are mixed and many studies are small.
1 of 5 standards Pello tracks · Third-party tested for banned substances
Tested for sport
- NSF Certified for SportVerified with NSF · Oct 5, 2026 ↗
Tested for substances banned in sport, with the formula and label reviewed and the manufacturing facilities inspected.
- Informed Sport
- Cologne List
Food & sourcing
- USDA Organic
- Non-GMO Project Verified
Diet claims
- Vegan: not stated
Brand or retailer label claim, not a certification.
- Gluten-free: yes
Brand or retailer label claim. In the US a gluten-free label means under 20 ppm gluten.
- Dairy-free: yes
From the allergen list, where one is available.
Certifications are as listed on the product's page at The Feed. NSF Certified for Sport is also checked against NSF's own database. Certifications can lapse, so check the certifier's search before you rely on one, especially if you're drug tested.
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3 products on Pello, mainly protein, creatine and performance.
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