Muscle Nation Custard Protein is a premium, thick dessert-style protein powder formulated with 100% Micellar Casein. Unlike standard Whey Protein Isolate (WPI) which digests rapidly within 1 to 2 hours, micellar casein features a unique molecular structure that forms a gel-like substance in the stomach. This creates a slow, sustained-release digestion wave over several hours, supplying a steady stream of amino acids to your muscle fibers while keeping you feeling full for longer.

Each standard 40g serving delivers a lean, high-protein macronutrient profile designed to fit seamlessly into any weight management or muscle conditioning plan:

Protein: 25g to 26g of complete, premium micellar casein protein (varying slightly by flavor profile).

BCAAs & Glutamine: Packed with over 5g of naturally occurring Branched-Chain Amino Acids and 5g of Glutamine to support post-workout tissue repair.

Fats: Extremely lean, containing low fat that is optimized by the inclusion of healthy Medium-Chain Triglycerides (MCT oil powder).

Macros: Low in active carbohydrates, low in sugar, and stays under 150 calories per serving.

Muscle Nation infuses this casein powder with premium MCT Oil (Medium-Chain Triglycerides) to provide a clean, fast-burning energy source that supports metabolic efficiency. MCTs bypass standard fat digestive pathways and are sent directly to the liver for immediate utilization, while simultaneously contributing to the exceptionally smooth, thick, and velvety "custard" mouthfeel that eliminates any dry or chalky texture.

Sprint Fit stocks multiple buying options to suit your macro goals and kitchen pantry:

7-Serve Box: Features convenient single-serve sachets—perfect for travel, a quick work snack, or testing a new flavor profile.

1kg Tub: Provides a massive 25 full servings based on the standard daily 40g level scoop (delivering the absolute best long-term cost-per-serving value).

While its slow-release amino acid release makes it the ultimate pre-bedtime recovery treat to support your body through an overnight fasting window, it is incredibly versatile. It functions perfectly as an anytime-of-day snack, a low-calorie midday dessert substitute, or a filling addition to your breakfast oats to maximize daily satiety and appetite control.

To get a true, smooth custard consistency, do not mix it like a traditional liquid shake.

Add 1 level scoop (40g) of powder into a bowl.

Slowly pour in roughly 90–100ml of cold water or your preferred milk.

Stir vigorously with a spoon until the liquid is fully absorbed into a thick, creamy custard paste. Pro-tip: Pop the mixed bowl into the fridge for 15 to 20 minutes, or the freezer for 5 minutes, to enjoy a chilled, decadent pudding treat.

Muscle Nation is legendary for engineering elite, authentic dessert flavor profiles. Top-selling customer favorites across New Zealand include Choc Honeycomb, Cookies & Cream, Vanilla, Banana Sundae, and White Choc Hazelnut.

Sprint Fit provides premier nationwide courier fulfillment. All orders completed before 3:45 pm, Monday through Friday, automatically qualify for immediate same-day warehouse dispatch. Most Auckland and North Island addresses receive their custard essentials overnight, while South Island destinations safely arrive within 1 to 2 business days.