Person lifting a barbell in a gym setting, focusing on strength training and high-intensity workouts

Unlock more in your routine

Which protein is right for you?

Put the World's Best-Selling Whey Protein Powder to the Test!4

Supports Muscle Recovery

The Worlds #1 Whey Protein Powder*

24g of Premium Whey Protein

Gold Standard optimum nutrition whey protein
Gold Standard Plant Protein Nutrition

Supports Muscle Health

Great-tasting vegan formula

24g plant protein per serving

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INTRODUCING NEW

PRO QUENCH

Refresh & Replenish like a Pro!

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Why do we need protein?

Muscle arm

Supports Muscle Recovery and Health

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An Important Macronutrient

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Good Snack in Between Meals

Top Protein Myths BUSTED!

Myth icon

Whey protein will make me bulky.

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We believe you get out what you put in – which is why our award winning manufacturing facilities only use the highest quality ingredients and strictest quality control when making our products. Your genetics and your strength training program dictate how much muscle you build. Protein* only supports this training.

Myth icon

Whey protein is bad for my health.

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Protein is an important macronutrient that supports muscle recovery and overall health. Whey protein is a food and a common by-product of cheese making. Those with a dairy allergy should consult their primary healthcare provider before consuming.

Myth icon

Whey protein has to be taken post workout.

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Whey protein can be taken anytime throughout the day to help you hit your daily protein requirements, but it may be a good habit to take your shake after training to support muscle recovery.*

Which protein is right for me?

ON Vegan Protein

Vegan Protein

ON Casein Protein

Overnight Muscle Recovery

Optimum Nutrition Whey Protein

Post-Workout Recovery

ON Serious Mass

Muscle & Weight Gain Goals3

ON Ready to drink shake

Anytime, Anywhere for your busy lifestyle

Person holding a smartphone displaying a protein goal calculator app with nutritional information and product suggestions

How much protein do I need?

Find out in under 60 seconds with our protein calculator

TAKE THE QUIZ
Optimum Nutrition Platinum Hydro Whey and Platinum Rebuild protein supplements, ideal for post-workout nutrition

Platinum Protein for Strength & Recovery

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Optimum Nutrition supplement range including Gold Standard Whey, Serious Mass, Casein, Hydro Whey, and Isolate protein powders

Protein is for Everyone

Support muscle growth and recovery with convenient, high-quality protein powders and shakes.

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How Can I Add Protein to my Day?

Two mugs filled with hot chocolate topped with marshmallows, placed on a wooden surface

Protein Hot Chocolate

Gold Standard Whey protein powder container next to a plate with chocolate brownies and chocolate chunks

Chocolate Protein Brownies

Stack of pancakes with syrup and blueberries on a plate, next to a container of protein powder

Protein Blueberry Pancakes