Custard, shake or clear and fruity. Here's how to pick the protein you'll actually finish.
Help me choosePick the moment that sounds most like you and your match moves to the top of the range.
The bestseller. Dessert, but it counts.
A slow-digesting casein that whips into a thick, spoonable custard with just water or milk. It keeps you fuller for longer, which makes it the go-to protein snack and the perfect last thing before bed. Warm it, freeze it, or eat it straight.
The cult classic shake.
Fast-absorbing, easy-digesting and low in lactose. This is the everyday workhorse: shake it after a session, blend it into smoothies, stir it through oats or bake with it. If you only own one tub, make it this one.
Protein that drinks like juice.
A light, clear alternative to the milky shake, with collagen and electrolytes alongside the protein. Perfect when it's hot, when you're between meals, or when the thought of another creamy shake doesn't appeal.
| Custard Casein | Whey Isolate | Protein Water | |
|---|---|---|---|
| Digestion | Slow and steady | Fast | Fast |
| Best moment | Snack, dessert, before bed | Post-workout, daily shake | Hot days, between meals |
| Texture | Thick, spoonable | Smooth, milky | Clear, juice-like |
| Mix with | Water or milk | Water, milk, smoothies, oats | Cold water |
| Also try | Warm or frozen | Baking and mug cakes | Over ice with fruit |
| Custard Casein | Whey Isolate | Protein Water | |
|---|---|---|---|
| Serve size | 40g | 33g | 30g |
| Energy | 142 cal | 119 cal | 98 cal |
| Protein | 24.4g | 26g | 24.1g |
| Carbs | 5.9g | 2.1g | 0.5g |
| Fat | 1.6g | 0.3g | 0g |
| BCAAs | 4.9g | 6.4g | 4.6g, with EAAs |
| Also in there | 2.1g fibre, 88% of your daily calcium | Under 1% lactose, digestive enzymes | Collagen, electrolytes, vitamin C |
Per serve, from the official nutrition panels for Vanilla and Pink Lemonade. Numbers vary slightly by flavour, and no gluten was detected in any of the three. The full panel lives on every product page.
Flavour is personal. Every protein comes as a sample pack, so you can find your favourite before committing to a full tub.
The Protein Sample Pack
A taste of the whole range in one box.
Try the range
Whey, 6 flavours
Every WPI flavour in single serves.
Try Whey
Custard, 7 flavours
Seven desserts, one spoon required.
Try Custard
Protein Water, 8 flavours
All eight fruity flavours, single serves.
Try Protein Water
There's no wrong time to hit your protein target. But if you want to be precise, this is how the range maps to a day.
Protein provides the amino acids your body uses to build and repair muscle after training. A powder is simply a convenient, consistent way to hit your daily target when whole-food meals don't cover it.
Speed. Whey absorbs quickly, which suits post-training and daytime use. Casein digests slowly and keeps you fuller for longer, which is why Custard works so well as a snack or before bed. Most people do best with both in the cupboard.
A common range for active people is roughly 1.6 to 2.2 grams per kilo of body weight per day. Spread it across meals, and use shakes to fill the gaps rather than replace real food.
Yes. Whey works in baking, pancakes and mug cakes. Custard can be warmed like a real dessert or frozen into an ice-cream texture. Protein Water is best kept as a cold drink.
The full Muscle Nation range covers your whole day, from the first scoop of oats to winding down at night. No shaker required for half of it.
This guide is general information, not personal dietary advice. If you have specific health conditions or dietary requirements, check with your GP or an accredited dietitian before adding supplements to your routine.
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