Nutritional information may vary depending on flavour.

What is Impact Micellar Casein?

Impact Micellar Casein is our highly popular milk protein powder, designed to be slow-absorbing to provide a sustained supply of protein between meals and even while you sleep.

This makes it the perfect choice for bedtime protein shakes, helping you to wake up raring to go, ready for your next session. It also includes a complete amino acid profile for a well-rounded formula.

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• Contains 23g of slow-release protein per serving
• Features a complete amino acid profile
• Makes the perfect night-time protein shake
• Available in a range of delicious flavours
• From the UK and Europe’s Number 1 Sports Nutrition Brand**

Nutritional information may vary depending on flavour.

What are the benefits of Impact Micellar Casein?

Our Impact Micellar Casein is packed with 23g of protein, making it ideal for helping grow and maintain important muscle.¹

Casein takes a long time to be digested and absorbed by the body, making it the best blend for a more sustained supply of protein throughout the day or night.

Who is Impact Micellar Casein for?

Getting enough protein into your diet is super-important for anyone working towards a fitness goal. It’s especially ideal for those who prefer a night-time shake with a gradual release of protein.

As one of the most common sources of protein is meat, the fact that our Slow-Release Casein is suitable for vegetarians makes it perfect for getting a protein boost with minimal effort, whatever your lifestyle. Plus, our blend doesn’t have any ingredients containing gluten.

What does Impact Micellar Casein taste like?

Our protein powders aren’t only created to offer great nutritionals, but to deliver on taste too. That's why we offer Slow-Release Casein in range of flavours to suit anyone, choose your favourite from the classics — Chocolate, Strawberry, and Vanilla.

Or, it comes in Unflavoured if you’d rather put your own twist on shakes and smoothies.

1. Protein contributes to the growth and maintenance of muscle mass.

**Source: Euromonitor International Limited; Consumer Health 2025 edition, retail value sales (RSP), all retail channels, 2024 data.

When to take Impact Micellar Casein?

For best results, we recommend adding 1 large scoop (30g) to water or milk 30 minutes before bed. Our Slow-Release Casein is also ideal at any time for a convenient shake to give you the protein you need to fuel your training ambitions.

What does Impact Micellar Casein work well with?

While protein is super-important to achieving your training goals, it's key that you've got other areas of your nutrition covered.

Try Slow-Release Casein alongside our ZMA® supplement, which provides a unique blend of zinc, magnesium, and vitamin B6 to deliver a range of health benefits, including the reduction in tiredness and fatigue.²

2. Vitamin B6 contributes to a reduction in tiredness and fatigue.

Unflavoured

Serving Size - 1 1/4 Scoops (30g)

Servings Per Container - 33 (1kg), 83 (2.5kg), 166 (5kg)

Why has the packaging changed?

We're excited to introduce new packaging as part of our redesign, but you might still see our previous packaging in your orders as we prioritise reducing waste. Rest assured, it's the same high-quality product.