Muscle Nation Casein Protein Powder

Recover strong and rest easy with the best casein protein in New Zealand.
From Optimum Nutrition Casein to Muscle Nation and Rule 1, these slow-release proteins fuel overnight recovery and help maintain lean muscle mass between meals. Rich in essential amino acids and designed for sustained absorption, casein is ideal before bed or during extended periods without food.

Shop premium casein protein brands at the best prices — only at Sprint Fit.

Muscle Nation is a leading name in Australia's activewear and supplement industry, known for its rapid growth and commitment to quality. Based in Brisbane, this family-oriented brand has built a unique community and culture centered around fitness and wellness. When it comes to reaching your fitness goals, Muscle Nation offers a wide range of premium supplements, including protein waters/powders (with vegan-friendly and gluten-free options), pre-workouts, aminos, creatine, and protein custard. Whatever your fitness journey, Muscle Nation has the supplements you need to support your success.