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“Feels like a treat not a supplement”
Pascal S.
“The first protein drink I actually like”
Charlotte S.
“It's a gamechanger!”
Lina V.
“All the protein but none of the heaviness”
Marieken W.
“Absolutely love it!”
Ashley C.
“20 grams of protein never tasted this good”
Katarina E.
“It's so refreshing!”
Catherine A.
“My new go-to after every workout”
Samuel H.
“Simply the best!”
Sascha I.
“Honestly it just tastes like a soda”
Sophia L.
“Functional and convenient”
Noah K.
“Finally a tasty and refreshing protein water!”
Ravi W.
“Chalky protein shakes are history!”
Antoine T.
“Amazing taste!”
Daniella A.
“This protein drink is the future”
Olivia D.
“Feels like a treat not a supplement”
Pascal S.
“The first protein drink I actually like”
Charlotte S.
“It's a gamechanger!”
Lina V.
“All the protein but none of the heaviness”
Marieken W.
“Absolutely love it!”
Ashley C.
“20 grams of protein never tasted this good”
Katarina E.
“It's so refreshing!”
Catherine A.
“My new go-to after every workout”
Samuel H.
“Simply the best!”
Sascha I.
“Honestly it just tastes like a soda”
Sophia L.
“Functional and convenient”
Noah K.
“Finally a tasty and refreshing protein water!”
Ravi W.
“Chalky protein shakes are history!”
Antoine T.
“Amazing taste!”
Daniella A.
“This protein drink is the future”
Olivia D.
Citrus
12 pack
Sparkling protein water
4.8
54 reviews
A refreshing and light carbonated protein drink with natural citrus flavor. Each 330ml can is packed with 20g of next-gen protein and just 83 calories, derived solely from the protein.
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A clear protein drink that actually tastes good
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20 grams of innovative whey protein per drink
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Free from sugar, fat and lactose
01
Pick your pack(s)
Estimated delivery:
14
May
2026
Free shipping on orders over €50
Sparkling protein water
One-time purchase
Your refreshing go-to protein drink
Citrus
12 pack
(4.8)
Sparkling protein water
A refreshing and light carbonated protein drink with natural citrus flavor. Each 330ml can is packed with 20g of next-gen protein and just 83 calories, derived solely from the protein.
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Protein drink you’ll actually enjoy.
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Smooth taste, no protein flavor.
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20g of pure BLG protein per can.
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Free from sugar, fat and lactose.
Subscription
The benefits
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Never run low on protein again
With a subscription, your favorite packs are delivered automatically every month — at a better price and on the day you choose.
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3 day reminder
We'll email you before each shipment. Not ready? Easily delay your delivery. Don't worry, we'll only bill you when your order ships.
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Cancel or modify anytime
Easily cancel, make changes, add products, and manage your delivery schedule through your online account. You're always in control.
Frequently asked questions about subscriptions.
Once you subscribe, your order is automatically processed and delivered on a monthly basis. You can manage your subscription at any time, including updating your details or cancelling when needed.
Yes. Subscription pricing is tiered based on quantity — 5% off for 1 pack, 10% off for 2 packs, and 15% off for 3 or more. The more you order, the better the value.
Your order will be delivered monthly on a recurring schedule. This ensures you always have a consistent supply without needing to reorder.
Yes. You can cancel your subscription at any time through your account, with no minimum commitment. Once cancelled, no future orders will be processed.
You’ll be charged automatically before each scheduled shipment. This ensures your order is processed and shipped on time without interruption.
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Over two years of development resulted in a sparkling protein water crafted exclusively from the highest quality ingredients — all sourced and produced in Europe. The key ingredients include:
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Beta-lactoglublin (BLG)The purest form of whey protein — clinically validated and proven to maximise muscle growth, enhance recovery, and support lean muscle. Learn more
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Carbonated spring waterLightly carbonated Belgian spring water. Extra filtered for a smooth taste and a pH level that enhances the drink’s refreshing character.
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Natural citrus flavorA refreshing mix of lemon, lime, and orange, crafted from real fruit extracts for a bright and natural citrus taste.
Clear formulation- Gluten free
- Non-GMO
- Lactose free
- No preservatives
- No sugar
- No artificial colors and flavors
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As a science-based company, we hold ourselves to the highest standards. Each batch undergoes independent testing to guarantee unmatched purity and performance. For complete transparency, we share every lab result so you know exactly what you’re getting.
Our standards- ISO 22000 certified quality assurance
- GMP/HACCP-compliant production
- Only science-backed European ingredients
- Independently lab-tested batches
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Clean Label Certified
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Anti-Doping Certified
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Kosher Certified
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ISO-22000 Certified
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Halal Certified
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With 20g of high-quality protein per can, TWOZERO is a refreshing alternative to your traditional protein shake. We recommend enjoying 1–2 cans per day, especially one right after a workout for optimal recovery.
Tip: Not drinking your TWOZERO right away? Use our insulated sleeve to keep it cold for an extra 2–3 hours.
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Store cans in a cool, dry and dark place.
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Once opened, keep chilled and drink within 12 hours.
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For the best experience, enjoy ice cold.
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Unopened cans stay fresh for 12+ months after production.
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By isolating the best part of whey protein – Beta-Lactoglobulin (BLG) – we’ve not just created a product with the purest and most powerful protein available globally, but it also offers several other key benefits.Learn more about BLG®
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20g protein per can: Just as much protein as your standard shake, but without the hassle and thick milky texture.
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Light and easy to digest: Naturally light, lactose-free and gentle on your stomach.
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Low in calories: Every calorie comes from quality protein — ideal for anyone watching their calorie intake.
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Perfect on the move: Take it anywhere, especially with our free insulated sleeve that keeps your can cold for 2 to 3 hours.
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Ingredients list
Citrus
Nutrition values
|
Per 100ml
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Per can (330ml)
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|---|---|---|
| Energy |
106 kJ
25 kcal |
350 kJ
83 kcal |
| Fat | 0 g | 0 g |
| - of which saturates | 0 g | 0 g |
| Carbohydrates | 0 g | 0 g |
| - of which sugars | 0 g | 0 g |
| Protein | 6.1 g | 20 g |
| Salt | 0 g | 0 g |
Ingredients: carbonated water, bovine milk beta-lactoglobulin (whey protein) (6.5%), acid: citric acid, natural flavor, sweetener: sucralose, natural color: caramel, concentrate: carrot and safflower.
Contains no: GMO, lactose, gluten, yeast, sugar, fat, carbs, artificial colorings and flavorings, preservatives and anti-foaming agent
Allergens: Bovine milk
Amino acid profile
Essential
Essential amino acids (EAAs) are not made by the human body and must be obtained through diet.
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Per 100ml
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Per can (330ml)
|
|
|---|---|---|
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Makes histamine (immune + stomach acid) |
0.1 g | 0.3 g |
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Energy during exercise |
0.4 g | 1.3 g |
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Leucine is the most important essential branched-chain amino acid for supporting muscle growth and repair. It activates muscle protein synthesis by stimulating the mTOR pathway, helping to build and maintain muscle mass. |
1.0 g | 3.2 g |
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Leucine is the most important essential branched-chain amino acid for supporting muscle growth and repair. It activates muscle protein synthesis by stimulating the mTOR pathway, helping to build and maintain muscle mass. |
0.7 g | 2.4 g |
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Detox function, produces other amino acids |
0.2 g | 0.6 g |
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Makes dopamine (mood + focus) |
0.2 g | 0.7 g |
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Supports skin and gut health |
0.3 g | 1.1 g |
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Makes serotonin (sleep + mood) |
0.1 g | 0.4 g |
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Muscle repair & energy |
0.4 g | 1.2 g |
Non-Essential
Non-essential amino acids (NEAAs) are produced naturally by the body and don’t need to be consumed through food.
|
Per 100ml
|
Per can (330ml)
|
|
|---|---|---|
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Helps convert glucose into energy and supports muscle endurance |
0.4 g | 1.4 g |
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Improves blood flow and nitric oxide production |
0.2 g | 0.5 g |
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Helps convert glucose into energy and supports muscle endurance |
0.3 g | 1.0 g |
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Plays a role in energy production and hormone regulation |
0.4 g | 1.4 g |
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Supports detoxification and antioxidant production |
0.2 g | 0.6 g |
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Acts as a key neurotransmitter for brain function |
0.8 g | 2.5 g |
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Supports gut health and immune function |
0.5 g | 1.6 g |
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Contributes to collagen production and sleep quality |
0.1 g | 0.3 g |
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Essential for collagen formation and joint health |
0.3 g | 1.1 g |
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Supports brain function and cell membrane formation |
0.2 g | 0.8 g |
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Precursor to dopamine and thyroid hormones |
0.2 g | 0.7 g |
BLG protein explained
What you should know about BLG.
Before we dive into Beta-Lactoglobulin (BLG), the protein used in TWOZERO®, let’s first cover the basics.
What is exactly a protein?
Protein one of the body’s most important components. It helps build and repair muscles, skin and other tissues, and supports the production of enzymes and hormones that keep your body functioning properly. You can get protein from everyday foods like meat, fish and dairy, but also from protein supplements such as whey or pea.
What is protein made of?
Proteins are made up of amino acids, there are 20 different amino acids. Each amino acid plays a unique role in the body: some stimulate muscle protein synthesis — the key process for building new muscle tissue — while others support energy production during exercise or help regulate blood sugar. Amino acids are grouped into two categories: essential and non-essential.
Essential amino acids
These 9 amino acids cannot be produced by your body and must come from food or supplements.
Amino acids: Lysine, Methionine, Threonine, Phenylalanine, Tryptophan, Histidine, Leucine*, Isoleucine*, Valine*
Non-essential amino acids
These 11 amino acids are produced naturally by the body and therefore are not required from diet.
Amino acids: Alanine, Glutamic, Glycine, Asparagine, Serine, Proline, Glutamine, Arginine, Glutamine, Cysteine, Tyrosine, Aspartic acid
* These are branched-chain amino acids (BCAAs), a special subset of EAAs that play a key role in muscle recovery and growth.
Whey as golden standard
Whey protein is the most used and trusted protein supplement worldwide. This is because whey protein has a complete amino acid profile and, unlike other proteins, contains a high amount of essential amino acids.
What is a complete amino acid profile?
A protein source is called complete when it contains all 9 essential amino acids in sufficient amounts. While whey is a complete protein, many plant-based protein supplements, such as pea protein, are not.
Whey is not just one protein
Unlike what many people think, whey protein is not a single protein. It is actually a blend of several proteins, known as protein fractions.
Each fraction has a unique amino acid profile, which means that the proportion of individual amino acids — essential and non-essential — differs between fractions.
While standard whey contains a mix of protein fractions, TWOZERO® uses only Beta-Lactoglobulin (BLG).
BETA-LACTOGLOBULIN ±55%
ALPHA-LACTALBUMIN ±20%
Glycomacropeptide ±10%
Others ±10%
Immunoglobulins ±5%
Protein fractions
Whey more powerful
The reason we focus on this single protein fraction is simple: BLG stands out with its unmatched amino acid profile. It contains far more essential amino acids and BCAAs than any other protein fraction. By isolating BLG, whey protein reaches its purest and most potent form: pure BLG.
When comparing BLG to standard whey, this is how the amino acid profiles differ:
Standard Whey
Pure BLG
(TWOZERO®)
60
50
40
30
20
10
0
+26%
EAA
+40%
BCAA
+45%
Leucine
% of total protein
What is leucine?
Leucine is one of the BCAAs and plays a key role in kickstarting muscle protein synthesis (MPS), the body’s process for repairing and building muscle after exercise. It is the most important amino acid for optimal muscle recovery and growth.
45% more leucine than standard whey
Traditional whey protein typically contains around 10.9% leucine. By comparison, BLG contains 15.8% leucine by weight, providing 45% more leucine per gram of protein.
This results in 3.2g of leucine per can of TWOZERO®, whereas a traditional protein shake with 20g of standard whey provides only 2.2g of leucine.
This matters because scientific studies show that about 3 grams of leucine are required to maximally stimulate muscle protein synthesis (MPS). If this threshold is not reached within a 1–2 hour window after consuming protein, MPS is only partially activated or may not be activated at all.
20G Standard Whey
20G Pure BLG (TWOZERO®)
3.5
3.0
2.5-3g leucine threshold
2.5
2.0
1.5
1.0
0.5
0.0
0306090120
Time (min)
Leucine content (g)
Why is the leucine threshold so important?
Leucine acts as the on-switch for muscle growth. Only when there is enough leucine in your blood — so when the leucine threshold is met — does your body receive the signal to activate muscle protein synthesis (MPS). This is the process where your body repairs and builds muscle.
Perfectly chilled, wherever you go.
Get a free insulation can sleeve with your first order.
Each can contains
20 grams of the
purest whey protein
Through a patented crystallisation process, we’ve isolated the most effective part of whey protein: Beta-Lactoglobulin. A protein source richer in essential amino acids and higher in leucine than any other protein on the market.
By using only this superior protein fraction, each can delivers an impressive 3 grams of leucine—the clinically proven threshold required to activate muscle protein synthesis. Learn more
Compare protein source
BLG vs
0.010.020.030.040.050.060.0
Beta-lactoglobulin (BLG)
15.7%
+45%
Whey Protein
10.8%
Leucine % OF TOTAL PROTEIN
Nutrition types explained
Understanding amino acids
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Leucine
Leucine is an essential amino acid that plays a key role in stimulating muscle-protein synthesis — the process your body uses to build and repair muscle tissue. It is considered the most important amino acid for triggering the “muscle-building.
BCAA
Branched-Chain Amino Acids (BCAAs) include leucine, isoleucine, and valine. They make up a large portion of the essential amino acids in muscle tissue and are directly used by the muscles as an energy source during exercise. BCAAs are best known for helping reduce muscle.
EAA
Essential Amino Acids (EAAs) are the nine amino acids your body cannot produce on its own. They must come from food or supplements and are all required to build and repair muscle. A complete protein source provides all EAAs in sufficient amounts.
Learn more about leucine
Your recovery starts with leucine.
You’ve probably never heard of leucine, MPS, or the leucine threshold. No worries — let’s start with some basics about protein first:
-
1
Proteins are made from amino acids, which act like tiny building blocks— put them together, and you get a protein.
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2
There are 20 different amino acids, each with its own distinct role in the body: some help repair muscles, while others support energy production during exercise and help regulate blood sugar.
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3
Amino acids can be divided into two groups: non-essential amino acids, which the body produces on its own, and essential amino acids (EAAs), which must be obtained through the diet.
Essential amino acids
These 9 amino acids cannot be produced by your body and must come from food or supplements.
Amino acids: Lysine, Methionine, Threonine, Phenylalanine, Tryptophan, Histidine, Leucine*, Isoleucine*, Valine*
Non-essential amino acids
These 11 amino acids are produced naturally by the body and therefore are not required from diet.
Amino acids: Alanine, Glutamic, Glycine, Asparagine, Serine, Proline, Glutamine, Arginine, Glutamine, Cysteine, Tyrosine, Aspartic acid
* These are branched-chain amino acids (BCAAs), a special subset of EAAs that play a key role in muscle recovery and growth.
-
4
Branched-Chain Amino Acids (BCAAs), are a group of 3 EAAs: leucine, isoleucine, and valine. They are called “branched-chain” because of their chemical structure, which looks like a branch.
-
5
Whey protein is not a single protein: it is actually a blend of several proteins, known as protein fractions. Each fraction has a unique amino acid profile, which means that the proportion of individual amino acids differs between fractions.
Now that we’ve covered the basics, we can take a closer look at what leucine actually is and the role it plays in your body:
What is leucine?
Leucine is one of the nine essential amino acids and is part of the three branched-chain amino acids (BCAAs). Unlike most other amino acids, BCAAs are mainly broken down in the muscles instead of the liver, which makes them play an important role in repairing and building muscle.
But why is leucine so important?
Leucine is like the “on-switch” for muscle recovery and growth. When leucine levels in your blood reach a certain point, your body gets the signal to kickstart muscle protein synthesis (MPS) — the process that repairs and builds muscle tissue after exercise.
Research shows that around 2.5–3 grams of leucine are needed to fully activate MPS after a workout. If you don’t hit this leucine threshold within 1–2 hours of eating protein, your muscle-building process may only be partially activated — or might not start at all.
What happens if you don’t hit the 2.5-3g leucine threshold?
Leucine signals mTOR, the key pathway for muscle growth (MPS). If you fall short on leucine, mTOR activation is weaker, and your muscles don’t receive the full growth signal. This means that even with enough protein, building muscle is less efficient.
Leucine levels across protein sources
Every protein source has a unique amino acid profile, which means the levels of certain amino acids— like leucine —can vary widely. For example, plant-based proteins such as pea, rice, or hemp are typically lower in leucine, while animal-based proteins like whey are much higher.
This also explains why whey is the world’s most popular post-workout supplement: it has an optimized amino acid profile for supporting muscle recovery and growth.
Whey more powerful
As mentioned earlier, whey is not a single protein. It is actually a blend of several proteins, each with its own unique amino acid profile.
Among these proteins, one clearly stands out due to its significantly higher content of essential amino acids: Beta-lactoglobulin (BLG). Using a patented isolation method, we were able to separate BLG from the other proteins in whey, creating a more pure and potent protein: Pure BLG — the protein used in TWOZERO®.
For comparison: BLG contains 45% more leucine, 26% more essential amino acids and 40% more BCAAs than standard whey (which includes all protein fractions). No wonder we call BLG “whey more powerful”.
Hitting the leucine threshold with BLG
What makes the BLG protein in TWOZERO® such a breakthrough?
It’s simple: it delivers more leucine.
Most protein supplements fail to reach the crucial 2.5–3 gram leucine threshold per serving, but TWOZERO® hits it effortlessly thanks to its BLG protein, which naturally contains far more leucine than standard whey—and even more compared to plant-based proteins like pea.
By the numbers: TWOZERO® delivers 3.2g of leucine per can, while a traditional whey protein shake provides only 2.2 grams and a pea protein shake just 1.7 grams of leucine.
20G Pea Protein
20G Standard Whey
20G Pure BLG (TWOZERO®)
3.5
3.0
2.5-3g leucine threshold
2.5
2.0
1.5
1.0
0.5
0.0
0306090120
Time (min)
Leucine content (g)
Why is the leucine threshold so important?
Leucine acts as the on-switch for muscle growth. Only when there is enough leucine in your blood — so when the leucine threshold is met — does your body receive the signal to activate muscle protein synthesis (MPS). This is the process where your body repairs and builds muscle.
Clean. Light. Powerful.
A sparkling water built for performance.
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Clear and sparkling
A refreshing taste with a light sparkle and crystal-clear appearance. No milky texture, no foam, no cloudiness — just clean, great-tasting protein.
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No protein taste
We used advanced protein to craft a drink without the typical protein taste or dry mouthfeel. It’s so refreshing, it might even replace your favorite soda.
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Ready-to-drink
Packed in a sleek can – easy to carry and perfect for your post-workout refreshment. No scooping, no shaking, no mess. Just grab and enjoy.
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Clean formulation
Made with the purest protein and only 83 calories per can, it delivers the most efficient protein-to-calorie ratio possible. More impact, less guilt.
We added only what matters. Without compromises.
No carbs
No gluten
No preservatives
No artificial colors
No artificial flavors
No sugar
No lactose
No fat
Non-GMO
No protein taste
Write a review
Reviews
4.8
/ 5
Based on 54 reviews
Our sparkling protein water has a 4.8 out of 5-star rating, with over 54 reviews collected.
Your feedback matters to us and to future TWOZERO® users.
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Real experiences
from users worldwide
It literally tastes like a refreshing drink. Not like a supplement, not like something you force down — just clean, light, and sparkling. I forget there's 20g of protein in it.
@davevelraeds
Strength & Conditioning Coach