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Why Protein Matters

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Knowledge, Nutrition & Inspiration for Every Goal

Your Complete Guide to Protein

From daily intake to how it can support your training goals
– get to grips with what protein is and why it matters.

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Protein Explained

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Expert Advice, Backed by Experience

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High-performance Recipes Full of Flavor

Discover easy, protein-packed recipes, snacks and shakes that fit your routine.

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Meet the Elite Athletes Who Choose Optimum Nutrition

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Cody Allen
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Miriah Lopez
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Clay Harbor
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Cameron Brink
Maria Birova

From the People Who Live It

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McLaren
Racing Fueled by Innovation
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McLaren
Unlocked Video Series

1. These statements have not been evaluated by the food and drug administration. This product is not intended to diagnose, treat, cure or prevent any disease.
2. No significant difference has been shown between RBST treated and non-RBST treated cows.
3. When used over time in combination with regular resistance exercise.
4. Source Euromonitor International Limited; Consumer Health 2025 Edition, Sports Nutrition category, %retail value shares, 2024 data.
5. Not a low calorie food.
6. Naturally occurring amino acids.
7. See nutrition information for saturated fat, cholesterol and sodium content.