Man exercising with dumbbells in a gym

Build Muscle

Fuel your body to train harder, recover better, and grow stronger.

Building muscle takes more than lifting heavy. It’s about consistency, the right nutrition, and giving your body what it needs before, during, and after your training sessions. Start with essentials that support strength, performance, and growth so you can keep progressing week after week.

Support Muscle Growth

Serious Mass Weight Gainer Protein Powder

If your goal is size, you need a calorie surplus. Serious Mass Weight Gainer Protein Powder delivers:

  • Up to 1,269 kcal per shake
  • 50g of whey protein + 3g creatine
  • 251–257g of carbohydrates
  • 25 vitamins and minerals
SHOP NOW

Gold Standard 100% Whey Protein Powder

Prefer a leaner option? The worlds #1 best selling protein powder^, delivers:

  • 24g of whey protein
  • 5.5g of naturally occurring BCAAs
  • Less than 120 calories per serving (low in sugars and low in fat)
SHOP NOW

Focus & Energy Before You Train

Gold Standard Pre-Workout Powder

A scoop of Gold Standard Pre-Workout before training helps support focus¹ and energy² when it matters most - providing:

  • 175 mg Caffeine
  • 3.4 g of creatine monohydrate
  • 1.5 g of beta-alanine
SHOP NOW

Performance for Strength Gains

Micronised Creatine

Micronised Creatine supports muscle energy so you can train harder for longer, increasing power during repeated high-intensity efforts³.

  • 3.4 g of Creatine Monohydrate per serving
  • Mixes easily with no gritty taste
SHOP NOW
Person holding a smartphone displaying a protein goal calculator app, with gym equipment in the background

How much protein do I need to build muscle effectively?

Find out in under 60 seconds with our protein calculator.

GET YOUR DAILY PROTEIN INTAKE

Explore Other Goals

Fuel Your Knowledge

View all
Swish Appeal Highlights Cameron Brink’s 2026 Preseason Prep with Support from Optimum Nutrition®
Press

Swish Appeal Highlights Cameron Brink’s 2026 Preseason Prep with Support from Optimum Nutrition®

Swish Appeal, a leading voice in women’s pro basketball under the SB Nation banner, recently featured an interview with star forward, Cameron Brink. The profile covers her continued development at ...

Muscle & Fitness Explores Cooper DeJean’s Offseason Training and Performance Routine
Press

Muscle & Fitness Explores Cooper DeJean’s Offseason Training and Performance Routine

Muscle & Fitness featured Philadelphia Eagles cornerback Cooper DeJean, examining his offseason training, preparation habits, and recovery approach. In the article, DeJean discusses building a...

Bustle Highlights Cameron Brink’s Pregame Routine and Nutrition Approach
Press

Bustle Highlights Cameron Brink’s Pregame Routine and Nutrition Approach

Bustle featured WNBA player Cameron Brink as part of its “The Pregame” series, exploring her game-day preparation, recovery habits, and overall approach to performance. In the feature, Brink discu...

Footnotes

¹Caffeine contributes to increased alterness and improved concentration.
²Contribute to normal energy yielding metabolism.
³Creatine increases physical performance in successive bursts of short-term, high intensity exercise.