Whey or Clear Whey? Nutrition, Tolerance and Price in an Honest Comparison

After a long evening of tennis in summer I fancy lots of things – a thick vanilla shake is rarely one of them. In winter, after strength training, it's a completely different story. That is the real difference between whey and clear whey: both are high-quality protein from milk whey, but they suit different moments.

Because we stock both variants in the Syrax shop, I put the labels side by side and did the maths: what's in a serving, what does the protein cost, who tolerates what – and when is each powder worth it? If you first want to know how much protein you actually need, read How much protein do you really need? beforehand.

The short answer

• Whey (concentrate) is the all-round protein: creamy, with water or milk, for porridge and recipes, and the cheapest per gram of protein.
• Clear whey (isolate) is the summer and post-sport protein: clear, light, fruity, almost free of fat, carbohydrates and lactose – but more expensive and, in our case, not gluten-free.
• Biologically both deliver almost the same: around 24 g of protein and about 2 g of leucine per serving.

Where both come from

Whey is milk whey protein – the protein left in the liquid whey after cheese-making. Two main forms are obtained from it:

Whey protein concentrate: the whey is filtered until the powder contains around 70 to 80 percent protein, depending on quality. The rest is some fat, milk sugar (lactose) and minerals. That makes the shake creamy and milky.

Whey protein isolate: filtered more heavily, usually with over 85 percent protein and hardly any fat or lactose left. For clear whey, an isolate is additionally acidified. In this acidic environment the protein molecules stay dissolved and the drink becomes clear – like juice or iced tea rather than a milkshake.

Both forms are complete proteins with all essential amino acids and are among the protein sources with the highest leucine content. Leucine is considered an important start signal for muscle building after training.

So clear whey is protein iced tea made from isolate: the same whey protein, but clear, fruity and, with 500 ml of water, more of a refreshing drink than a shake. Eduard explains how concentrate and isolate differ in general in Whey or isolate?.

The Syrax products head to head

All values come from the labels and product specifications, each for a serving of 30 g of powder. Prices: shop prices as of October 2026.

• Premium Whey
• Clear Whey

• Protein (g)Premium Whey: 23.4 gClear Whey: 24.7 g
• Energy (kcal ÷ 10)Premium Whey: 119 kcalClear Whey: 105 kcal
• Fat (g)Premium Whey: 2.5 gClear Whey: < 0.1 g
• Sugar (g)Premium Whey: 1.3 gClear Whey: 0.1 g

›以表格顯示資料

類別	Premium Whey	Clear Whey
Protein (g)	23.4 g	24.7 g
Energy (kcal ÷ 10)	119 kcal	105 kcal
Fat (g)	2.5 g	< 0.1 g
Sugar (g)	1.3 g	0.1 g

Different flavours have slightly different values: because of the cocoa, the chocolate Premium Whey provides 22.8 g of protein per serving, cookies and strawberry 23.4 g each. The strawberry flavour is coloured with the azo dyes E 124 and E 122 and therefore carries the warning "may have an adverse effect on activity and attention in children" – if you don't want that, choose vanilla, chocolate or cookies.

What the lab reports show

Current analyses from a German testing laboratory are available for both products: Premium Whey (batch 535863, December 2025) and Clear Whey (batch 338_02122024, July 2025). Heavy metals were below the EU maximum levels in each case, no salmonella or E. coli were found, and the total microbial count was low. A lab value for the actual protein content is not part of this standard analysis – Eduard explains how to read such reports and where their limits lie in How to assess supplements.

Protein and leucine: practically a draw

For muscle building, what counts most is protein intake across the day – according to the position stand of the International Society of Sports Nutrition, around 1.4 to 2.0 g per kilogram of body weight for people who train. Per meal, around 0.3 to 0.4 g per kilogram is considered sensible, so 20 to 40 g of protein for most people. That amount should contain around 2 to 3 g of leucine to stimulate muscle building effectively.

Both Syrax powders reach around 2 g of leucine per serving. If you are heavier or want a little more after a hard strength session, take 40 g of powder for a good 30 g of protein and around 2.7 g of leucine – whether classic or clear.

Tolerance: lactose, gluten, stomach

Lactose

One serving of Premium Whey contains 1.3 g of sugar, and in a neutrally sweetened concentrate that is practically all milk sugar. For comparison: a glass of milk (200 ml) contains around 9 to 10 g of lactose. Most people with lactose intolerance tolerate small amounts like those in a whey shake well when it's made with water. If you react very sensitively or have symptoms after small amounts, clear whey is the better choice: 0.1 g of sugar per serving.

Gluten – an important difference

A close look at the ingredients pays off here: our clear whey contains barley malt extract for flavour. Barley provides gluten, which is why gluten is labelled as an allergen. Our clear whey is therefore not suitable for people with coeliac disease or gluten intolerance. The Premium Whey contains no gluten-containing ingredients, but it does contain soy via the lecithin that improves solubility.

Stomach and training

Both proteins are digested quickly. Shortly after training, many people find clear whey lighter because it contains neither fat nor milk and feels more like a drink. A creamy shake, on the other hand, is more filling – an advantage if it is meant to replace a snack.

Taste and preparation

Premium Whey is mixed, according to the label, with 500 ml of water or low-fat milk. With milk you get around 17 g of extra protein from the milk, but also calories and lactose. With little liquid it becomes a pudding, in porridge a protein meal, in batter protein pancakes. You'll find ideas in Protein snacks and in the protein shake recipe.

Clear whey belongs in 500 ml of cold water. Two practical tips:

• Foam: isolate foams a lot when shaken. Let it stand briefly or swirl gently and the foam settles after one to two minutes.
• Cold is better: with ice cubes it tastes like iced tea. Lukewarm, the acidity comes through more.

Clear whey doesn't work well with milk, yoghurt or in the oven: the acidity makes milk curdle, and heating cancels out the advantage of the clear preparation.

What does the protein really cost?

The tub price is misleading: 1,000 g of Premium Whey costs €45.90, 500 g of Clear Whey €28.90. Per kilogram, clear whey is therefore around 26 percent more expensive. Because it contains a little more protein per gram, the gap narrows when you look at the price per protein:

• Premium Whey vanilla€1.47
• Premium Whey chocolate€1.51
• Clear Whey peach€1.76

›以表格顯示資料

類別	Price per 25 g of protein
Premium Whey vanilla	€1.47
Premium Whey chocolate	€1.51
Clear Whey peach	€1.76

With one serving a day that comes to around €42 a month for whey and around €52 for clear whey. If you use both, for example clear whey in summer and whey in winter, you end up somewhere in between.

Which protein suits you?

What about EAA or BCAA as an alternative?

Amino acid powders such as EAA are often sold as an "even faster" alternative. One serving of our EAA powder (10 g) provides 7.4 g of essential amino acids with 2.25 g of leucine – a solid signal, but not a complete protein. For most people a serving of whey is the better and cheaper choice because it provides all the other amino acids as well as the essential ones. When amino acids still make sense is covered in BCAA and EAA.

Common mistakes with protein powder

1. Drinking protein instead of eating it. A shake complements your diet; it doesn't replace meals of meat, fish, dairy, eggs or pulses.
2. More is more. Beyond your daily requirement, protein brings no extra muscle growth, just calories.
3. Overrating the "anabolic window". Whether the shake comes 20 or 90 minutes after training hardly matters for most people.
4. Overlooking allergens. Milk and soy in whey, gluten in clear whey – take a quick look at the ingredients.
5. Only looking at the tub price. Compare the price per 25 g of protein.

Conclusion: not either-or

If you only want to buy one protein powder, classic whey is a good choice: affordable, versatile, proven. Clear whey isn't a better choice but a different one – one that especially has its place on warm days and after endurance or racket sports. That's why, depending on the season, you'll find both in my sports bag. What always stays the same: food first, then the shake.

How to combine protein with creatine and which form of creatine goes in the shaker is covered in Creatine: powder, tablets or gummies?. Everything fundamental about whey protein can be found in the whey guide.

Sources: ISSN position stand on protein and exercise (Jäger et al., 2017) · EFSA: Scientific opinion on lactose thresholds in lactose intolerance (2010) · Labels, product specifications and lab reports of the Syrax products (as of October 2026)