Optimum Nutrition Gold Standard® Pre-Workout, Watermelon Candy, 10.58 oz (300 g) supplement bottle
Optimum Nutrition

Gold Standard® Pre-Workout, Watermelon Candy, 10.58 oz (300 g)

What We Researched
16 active ingredients analyzed · 10 inactive ingredients decoded · 9 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
80
Product Score Good
92
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D (as Cholecalciferol) 12.5 mcg 63%
Thiamin (as Thiamin Hydrochloride) 2 mg 167%
Niacin 20 mg 125%
Vitamin B6 (as Pyridoxine HCl) 2 mg 118%
Folate (200 mcg Folic Acid) 340 mcg DFE 85%
Vitamin B12 (as Cyanocobalamin) 10 mcg 417%
Pantothenic Acid(as D-Calcium Pantothenate) 10 mg 200%
Calcium 50 mg 4%
Creatine Monohydrate 3.3 g **
Beta-Alanine 1.6 g **
Micronized L-Citrulline 750 mg **
L-Tyrosine 385 mg **
Caffeine 175 mg **
Bioavailability Very Good

Absorption Rating

  • Vitamin D (as Cholecalciferol) Good
  • Thiamin (as Thiamin Hydrochloride) Fair
  • Niacin Good
  • Vitamin B6 (as Pyridoxine HCl) Fair
  • Folate (200 mcg Folic Acid) Fair
  • Vitamin B12 (as Cyanocobalamin) Fair
  • Pantothenic Acid(as D-Calcium Pantothenate) Good
  • Calcium Good
  • Creatine Monohydrate Good
  • Beta-Alanine Good
  • Micronized L-Citrulline Good
  • L-Tyrosine Good
  • Caffeine Good
Other Ingredients Very Good

Fillers & Additives

  • Natural and Artificial Flavor
  • Citric Acid
  • Calcium Silicate
  • Silicon Dioxide
  • Malic Acid
  • Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan) Medium
  • Sucralose
  • Tartaric Acid
  • Beet Juice Powder (Color)
  • Acesulfame Potassium
Efficacy Fair

Dosage Analysis

  • Vitamin D (as Cholecalciferol) 12.5 mcg Under-dosed
  • Thiamin (as Thiamin Hydrochloride) 2 mg Effective
  • Niacin 20 mg Effective
  • Vitamin B6 (as Pyridoxine HCl) 2 mg Effective
  • Folate (200 mcg Folic Acid) 340 mcg DFE Under-dosed
  • Vitamin B12 (as Cyanocobalamin) 10 mcg Effective
  • Pantothenic Acid(as D-Calcium Pantothenate) 10 mg Effective
  • Calcium 50 mg Under-dosed
  • Creatine Monohydrate 3.3 g Effective
  • Beta-Alanine 1.6 g Under-dosed
  • Micronized L-Citrulline 750 mg Under-dosed
  • L-Tyrosine 385 mg Under-dosed
  • Caffeine 175 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Calories 10
Total Carbohydrate 3 g 1%*
Vitamin D (as Cholecalciferol) 12.5 mcg 63%
Thiamin (as Thiamin Hydrochloride) 2 mg 167%
Niacin 20 mg 125%
Vitamin B6 (as Pyridoxine HCl) 2 mg 118%
Folate (200 mcg Folic Acid) 340 mcg DFE 85%
Vitamin B12 (as Cyanocobalamin) 10 mcg 417%
Pantothenic Acid(as D-Calcium Pantothenate) 10 mg 200%
Calcium 50 mg 4%
Sodium 20 mg 1%
Creatine Monohydrate 3.3 g **
Beta-Alanine 1.6 g **
Micronized L-Citrulline 750 mg **
L-Tyrosine 385 mg **
Caffeine 175 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Natural and Artificial Flavor Generally_safe

It is used to improve the taste of the product.

Citric Acid Safe

Adds tartness and acts as a natural preservative. Also aids in ingredient stability.

Calcium Silicate Safe

Prevents ingredient clumping during manufacturing.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Malic Acid Safe

Adds tartness and enhances fruit flavors in gummies and chewables.

Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan) Generally_safe

It is used as a thickening agent to improve the texture of supplements.

Sucralose Generally_safe

Adds sweetness to chewables, gummies, and powdered supplements without calories.

Tartaric Acid Safe

Provides sour taste in chewable supplements.

Beet Juice Powder (Color) Safe

It is used to add a red or pink color to the supplement.

Acesulfame Potassium Generally_safe

It is used to provide sweetness without adding calories.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$35$34$33$32$31 Mar 12 $33.00
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

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, Watermelon Candy a good supplement?

Optimum Nutrition Gold Standard® Pre-Workout, Watermelon Candy, 10.58 oz (300 g) received a product quality score of 80/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 16 active ingredients with 30 servings per container. Of the 10 inactive ingredients, 6 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, Watermelon Candy?

Optimum Nutrition Gold Standard® Pre-Workout, Watermelon Candy contains 16 active ingredients: Calories (10), Total Carbohydrate (3 g), Vitamin D (as Cholecalciferol) (12.5 mcg), Thiamin (as Thiamin Hydrochloride) (2 mg), Niacin (20 mg), Vitamin B6 (as Pyridoxine HCl) (2 mg), and 10 more. Notable high-dose ingredients include Vitamin B12 at 417% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Optimum Nutrition Gold Standard® Pre-Workout, Watermelon Candy safe to take?

Optimum Nutrition Gold Standard® Pre-Workout, Watermelon Candy, 10.58 oz (300 g) 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.