Optimum Nutrition Gold Standard Pre-Workout supplement bottle
Optimum Nutrition

Gold Standard Pre-Workout Review

What We Researched
13 active ingredients analyzed · 8 inactive ingredients decoded · 10 brand certifications checked · Page generated: Sep 2026
93
Product Score Excellent
100
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

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

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

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

Founded 1986 · Downers Grove, IL, United States · 311 products · optimumnutrition.com

Certifications

10 certifications
Consumerlab Source available Primary evidence
Informed Sport Source available Primary evidence
Labdoor Source available Primary evidence
Nsf Certified For Sport Source available Primary evidence
Usda Organic Source available Primary evidence
Vegan Certified Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence
Non Gmo Project Source available Primary evidence
Nsf Gmp Source available Primary evidence
Informed Choice Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Verified Evidence available Evidence
Testing Lab Disclosure — Claimed Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

5 incidents
Prop 65 Lead2025-07-21 Source available Primary source
Prop 65 Lead2024-11-22 Source available Primary source
Recall Various nutritional and beverage products2022-07-28 Source available Primary source
Prop 65 Lead2017-03-10 Source available Primary source
Lawsuit Deceptive claims about the plant-based enzyme 'Aminogen' and its effect on protein digestion and absorption.2013 Source available Primary source
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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 ingredients are flagged for review. The manufacturer, Optimum Nutrition, holds a brand trust score of 100/100.

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?

GoodSupp reviewed the inactive-ingredient data available for Optimum Nutrition Gold Standard Pre-Workout. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. 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 100/100 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 311 products in their lineup. 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 — read our methodology. 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.