Optimum Nutrition Gold Standard Pre-Workout supplement bottle
Optimum Nutrition

Gold Standard Pre-Workout

What We Researched
13 active ingredients analyzed · 8 inactive ingredients decoded · 9 brand certifications checked · Last updated: Mar 2026
93
Product Score Excellent
92
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Creatine Monohydrate 5g
Beta-Alanine mg
L-Citrulline mg
Acetyl-L-Carnitine Hydrochloride mg
N-Acetyl-L-Tyrosine Og
Pyridoxine Hydrochloride mg
Natural Caffeine mg
Nicotinamide ma
Calcium D-Pantothenate mg
Cyanocobalamin mg
Thiamin Hydrochloride mg
Pteroylmonoglutamic Acid mg
Cholecalciferol mg
Bioavailability Very Good

Absorption Rating

  • Creatine Monohydrate Good
  • Beta-Alanine Good
  • L-Citrulline Good
  • Acetyl-L-Carnitine Hydrochloride Good
  • N-Acetyl-L-Tyrosine Good
  • Pyridoxine Hydrochloride Fair
  • Natural Caffeine Good
  • Nicotinamide Good
  • Calcium D-Pantothenate Good
  • Cyanocobalamin Fair
  • Thiamin Hydrochloride Good
  • Pteroylmonoglutamic Acid Fair
  • Cholecalciferol Good
Other Ingredients Very Good

Fillers & Additives

  • Flavouring
  • Acids (Citric Acid, Malic Acid, L(+)-Tartaric Acid)
  • Anti-Caking Agents (Calcium Silicate, Silicon Dioxide)
  • Thickeners (Sodium Carboxy Methyl Cellulose, Xanthan Gum, Carrageenan) Medium
  • PerforMelon® Watermelon Extract (Citrus lanatus, fruit)
  • Sweeteners (Sucralose, Acesulfame K)
  • Colour (Beetroot Red)
  • Black Pepper Extract (Piper nigrum, fruit)
Efficacy Excellent

Dosage Analysis

  • Creatine Monohydrate 5g Effective

Supplement Facts

Ingredient Amount % Daily Value
Creatine Monohydrate 5g
Beta-Alanine mg
L-Citrulline mg
Acetyl-L-Carnitine Hydrochloride mg
N-Acetyl-L-Tyrosine Og
Pyridoxine Hydrochloride mg
Natural Caffeine mg
Nicotinamide ma
Calcium D-Pantothenate mg
Cyanocobalamin mg
Thiamin Hydrochloride mg
Pteroylmonoglutamic Acid mg
Cholecalciferol mg
Brand Trust Report
Optimum Nutrition

Founded 1986 · Downers Grove, IL, United States · 95 products · optimumnutrition.com

Certifications

9 certifications
Consumerlab Verified Source
Informed Sport Verified Source
Labdoor Verified Source
Nsf Certified For Sport Verified Source
Usda Organic Verified Source
Vegan Certified Verified Source
Fda Gmp Inspections Verified Source
Non Gmo Project Verified Source
Nsf Gmp Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed Source
In House Testing — Verified Source

Violation History

5 incidents
Prop 65 Lead2025-07-21Source
Prop 65 Lead2024-11-22Source
Recall Various nutritional and beverage products2022-07-28Source
Prop 65 Lead2017-03-10Source
Lawsuit Deceptive claims about the plant-based enzyme 'Aminogen' and its effect on protein digestion and absorption.2013Source
Related Supplements
Frequently Asked Questions
Is Optimum Nutrition Gold Standard Pre-Workout a good supplement?

Optimum Nutrition Gold Standard Pre-Workout received a product quality score of 93/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 13 active ingredients Of the 8 inactive ingredients, 0 are rated safe and 0 are flagged for review. The manufacturer, Optimum Nutrition, holds a brand trust score of 92/100 with 9 verified certifications including Consumerlab, Informed Sport, Labdoor, Nsf Certified For Sport.

What are the ingredients in Optimum Nutrition Gold Standard Pre-Workout?

Optimum Nutrition Gold Standard Pre-Workout contains 13 active ingredients: Creatine Monohydrate (5g), Beta-Alanine (mg), L-Citrulline (mg), Acetyl-L-Carnitine Hydrochloride (mg), N-Acetyl-L-Tyrosine (Og), Pyridoxine Hydrochloride (mg), and 7 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Optimum Nutrition Gold Standard Pre-Workout safe to take?

Optimum Nutrition Gold Standard Pre-Workout has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Optimum Nutrition a trustworthy supplement brand?

Optimum Nutrition receives a brand trust score of 92/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1986 and headquartered in Downers Grove, IL, United States, the company offers 95 products in their lineup. They hold 9 verified certifications including Consumerlab, Informed Sport, Labdoor, Nsf Certified For Sport. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Optimum Nutrition has 5 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.