Powered by CellOnePro™

Protein that moves with you.

25 g of complete protein in a light, fruity, clear drink, with added electrolytes. Made to sip while you train, not just after.

  • 30-day returns
  • Made in the USA

Saccharomyces cerevisiae, the yeast behind CellOnePro™

ISO KING CLEAR Fruit Punch tub

Saccharomyces cerevisiae, the yeast behind CellOnePro™

  • 25GProtein per scoop
  • 0GSugar per scoop
  • 110Calories per scoop
  • 9/9Essential amino acids

8x Mr. Olympia. Proprietary, patent-pending CellOnePro™. Made in the USA. Since 2011.

A different way to experience protein

Protein, during the workout?

An athlete sipping a clear protein drink between sets in the gym, an ISO KING CLEAR tub beside him

For decades, protein has meant a thick, creamy shake after training. But what about during it? Training in the gym, playing sports, cycling, running, hiking: those moments have belonged to water, sports drinks and amino supplements. Many people don't want a heavy, milky shake mid-session. ISO KING CLEAR is a refreshing protein drink made for those active moments, not just the post-workout routine.

  • Light, like a sports drinkFruit-flavored and clear, not a thick, milky shake
  • 25 g complete proteinAll 9 essential amino acids, while you train
  • Added electrolytesSodium, potassium and magnesium

Protein doesn't replace water. Keep drinking water as you train; CLEAR adds protein to the moment.

The CellOnePro™ story

We didn't compromise. We innovated.

  1. 1

    We saw it coming.

    Everybody wants more protein, and whey keeps getting harder to source and more expensive. Some brands answered with compromise. We went looking for a better way.

  2. 2

    About 18 months of research.

    We set three rules: quality, flavor, fair price. Many options passed one or two. We kept looking until one passed all three.

  3. 3

    The breakthrough: CellOnePro™.

    Ancient biology. Modern technology.The future of protein.

Ronnie Coleman in a blue RC polo, seated in front of the lit RC logo
Ronnie Coleman, 8x Mr. Olympia

Where protein comes from

There are three ways to make protein.

  1. A glass of milk, two eggs and a raw steak on paper
    01

    Animals

    Milk, eggs, meat. The classic sources, tied to farms and herds, and to the dairy supply.

  2. Bowls of soybeans, rice and split peas with a pea pod
    02

    Plants

    Soy, peas, rice. Extracted from crops, tied to fields and harvests.

  3. CellOnePro™
    Yeast cells, close up
    03

    Single cells

    Protein-rich yeast, cultivated under controlled conditions and grown by fermentation. Not dependent on dairy production or agricultural harvests. This is CellOnePro™.

No dairy farm. No crop field. A controlled fermentation.

Bread, grapes, wheat, a bowl of yeast powder and a glass of beer beside an ISO KING CLEAR Fruit Punch tub and a shaker of water with ice, a steel fermentation tank behind

Ancient biology

The yeast behind your bread. Rebuilt as protein.

CellOnePro™ starts with Saccharomyces cerevisiae, the same species of yeast people have used for thousands of years to bake bread and brew. It is not ordinary baker's yeast: controlled fermentation and advanced processing turn it into a concentrated, high-quality protein.

  1. Bread & brewingFor thousands of years
  2. FermentationA trusted process
  3. TodayComplete protein in your bottle

How CellOnePro™ is made

From yeast to scoop in 4 steps.

  1. Rows of steel fermentation tanks
    1

    Ferment.

    Selected Saccharomyces cerevisiae yeast is cultivated in a carefully controlled fermentation environment. The yeast grows and produces cellular material naturally rich in protein and amino acids.

  2. Yeast cells, close up
    2

    Open.

    Advanced processing opens and breaks down the yeast's cellular structure, making the protein inside accessible for extraction and refinement.

  3. A gloved hand holding a beaker of protein in a lab, a sieve and a scale on the bench
    3

    Purify.

    Specialized separation and purification remove unwanted non-protein components and concentrate the valuable protein fraction.

  4. A hand tipping a scoop of white ISO KING CLEAR powder into a clear shaker of water, the CLEAR tub beside it
    4

    Refine.

    The protein is tailored to its job. For ISO KING CLEAR, an extra step of hydrolysis breaks it into smaller peptides, so it dissolves into a clear drink. For ISO KING, a grade built for smooth, creamy shakes.

The result: a highly refined, animal-free protein, complete with all nine essential amino acids.

Hydrolyzed CellOnePro™

Why it's clear.

Clear protein drinks need excellent solubility, a light mouthfeel and minimal cloudiness. ISO KING CLEAR uses a hydrolyzed CellOnePro™ grade: hydrolysis breaks larger proteins into smaller peptides, so the protein dissolves into a light, clear, fruity drink instead of a milky shake. Same complete protein. A completely different way to drink it.

  • Hydrolyzed
  • Dissolves clear
  • All 9 EAAs
Hydrolysis: a long protein chain is cut into smaller peptides, which dissolve into a clear drink Whole protein One long chain Hydrolysis Cut into smaller peptides A clear drink Light, not milky
Clear, not milkyA clear shaker bottle of translucent, lightly tinted ISO KING CLEAR drink
25 g of protein per scoop with all 9 essential amino acids, including 5.3 g of BCAAs 25G PROTEIN PER SCOOP 9 of 9 essential amino acids Leucine Isoleucine Valine Lysine Methionine Phenylalanine Threonine Tryptophan Histidine 5.3 G BCAAS

What's in the scoop

25 G. All nine.

Proteins are built from amino acids, and nine of them are essential: your body cannot make them in sufficient amounts, so they have to come from food. A complete protein delivers all nine. Every scoop of ISO KING CLEAR does, without depending on dairy.

Three of the nine, leucine, isoleucine and valine, are the branched-chain amino acids, or BCAAs. They are part of the nutritional profile athletes look for when they choose a protein, and ISO KING CLEAR has 5,300 mg per scoop.

Hide the full amino acid profileSee the full amino acid profile
  • Lysine2,400 mg
  • LeucineBCAA2,200 mg
  • ValineBCAA1,650 mg
  • IsoleucineBCAA1,450 mg
  • Phenylalanine1,330 mg
  • Threonine1,300 mg
  • Histidine600 mg
  • Methionine500 mg
  • Tryptophan400 mg

Total EAAs 11,830 mgTotal BCAAs 5,300 mg

110 calories0 g sugar0 g fat per scoop

  • Sodium
  • Potassium
  • Magnesium

Key benefits

  • 25g Complete ProteinAll 9 Essential Amino Acids
  • Intra-Workout NutritionProvides amino acids while you train
  • Muscle Protein SupportSupports muscle protein synthesis and recovery
  • Early Recovery NutritionStart fueling muscle repair before your workout ends
  • Hydration SupportElectrolytes help replenish minerals during training
  • 5.3g BCAAsSupports your muscle-building nutritional needs
  • Dairy-Free, Lactose-Free & Vegan
  • Refreshing Clear ProteinA lighter alternative to traditional creamy protein shakes

Featured ingredients

  • Hydrolyzed CellOnePro™ Single-Cell Protein IsolateDelivers 25g of complete protein with all 9 essential amino acids to support muscle growth and recovery.
  • 5.3g Branched-Chain Amino Acids (BCAAs)Naturally occurring leucine, isoleucine, and valine that support muscle protein synthesis and recovery.
  • Hydration ElectrolytesSodium, potassium, and magnesium help maintain electrolyte balance and support normal muscle function during exercise.

Why you'll love it

Why wait until after your workout?

Sip refreshing, complete protein while you train to supply essential amino acids, support recovery, and stay hydrated.

Three flavors

Pick your flavor.

Same 25 g of complete protein in every flavor. Choose one and we set it in the order box for you.

  • Selected
    ISO KING CLEAR Fruit Punch tub with oranges, strawberries and berries

    Fruit Punch

    A bold, sweet-and-tangy mixed fruit punch. The classic sports-drink flavor, now with 25 g of protein.

    • 110 kcal
    • 1 scoop
    • 0 g sugar
  • Selected
    ISO KING CLEAR Pink Lemonade tub with lemons and raspberries

    Pink Lemonade

    Bright, tart pink lemonade with a sweet finish. Made for hot days and long sessions.

    • 110 kcal
    • 1 scoop
    • 0 g sugar
  • Selected
    ISO KING CLEAR Green Apple tub with green apples

    Green Apple

    Crisp, tangy green apple. Light and refreshing, sip after sip.

    • 110 kcal
    • 1 scoop
    • 0 g sugar

Ronnie Coleman Signature Series

The king stands behind it.

8x Mr. Olympia, 1998 to 2005. He put his name on Ronnie Coleman Signature Series in 2011 to make supplements for people who actually train. ISO KING CLEAR brings CellOnePro™ protein into the workout itself.

Earned, not claimed.Yeah Buddy!

  • Ronnie Coleman in his gym holding an ISO KING CLEAR Fruit Punch tub
  • ISO KING CLEAR Fruit Punch tub on a weight plate in a dark gym
  • Ronnie Coleman in his gym holding two ISO KING CLEAR Fruit Punch tubs
  • Ronnie Coleman smiling and flexing his biceps in a Ronnie Coleman shirt
  • Ronnie Coleman with his International Sports Hall of Fame medal

Wherever you move

One sip. Every session.

  • A cyclist taking a sip from a clear bottle
    On the bike.
  • A player drinking from a clear shaker courtside
    On the court.
  • A hiker sipping a clear drink on the trail
    On the trail.
  • A runner drinking from a clear bottle at the track
    On the track.
  • A woman on the move sipping ISO KING CLEAR
    Whenever you're on the move.

One technology, two experiences

Creamy or clear?

ISO KING Vanilla Cake Pop tub with cake pops and vanilla pods

Creamy

ISO KING

Rich, smooth, creamy. After training or whenever a shake fits your day.

2 lb · 27-28 servings · $39.99

See ISO KING
You're here
ISO KING CLEAR Fruit Punch tub

Clear

ISO KING CLEAR

Light, fruity, refreshing. Made for sipping during training and active moments.

20 servings · $49.99

Feature ISO KING ISO KING CLEAR
Experience Rich, smooth, creamy Light, fruity, refreshing
Best for After training or daily During training and active moments
Format Creamy CellOnePro™ grade Hydrolyzed clear grade with electrolytes
Protein 25 g, all 9 EAAs 25 g, all 9 EAAs

The difference is the experience, not our commitment to quality.

Or don't choose. Try both.

The full label

Nothing hidden.

ISO KING CLEAR Fruit Punch tub

Fruit Punch

About 20 servings · 1 scoop · 25 g protein · 110 calories · 0 g sugar

Other ingredientsHydrolyzed Single Cell Protein Isolate (from Saccharomyces cerevisiae as CellOnePro®), Citric Acid, Natural and Artificial Flavors, Malic Acid, Magnesium Citrate, Sucralose, Potassium Chloride, Silicon Dioxide, Acesulfame Potassium, Stevia Rebaudioside M, Stevia Rebaudioside A.

Supplement Facts

Serving Size: 1 Scoop (34g)
Servings Per Container: About 20

NutrientAmount per Serving% DV
Calories110
Total Fat0 g0%*
Total Carbohydrate1 g<1%*
Dietary Fiber0 g0%*
Total Sugars0 g†
Protein25 g50%*
Calcium15 mg1%
Iron1.4 mg8%
Sodium390 mg17%
Potassium100 mg2%
Magnesium100 mg24%
Hydrolyzed Single Cell Protein Isolate25 g†

* Percent Daily Values are based on a 2000 calorie diet
† Daily Value not established

Made in the USA with worldwide ingredients. · Must be 18 years of age or older to purchase and/or use this product. · *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent disease.

The offer

Protein you can sip. 20 servings. $49.99.

Brand new for 2026. Be one of the first to try it.30-day returns · Made in the USA

  • Quality, never compromised
  • Flavor you'll love drinking
  • Value: premium protein, made accessible

Consumers should not have to choose between nutritional quality and a product they genuinely enjoy drinking.

The three ISO KING CLEAR flavors in a row: Fruit Punch, Pink Lemonade and Green Apple

FAQ

About the product

What is ISO KING CLEAR?

ISO KING CLEAR is a light, fruity, clear protein drink powered by CellOnePro™. Each scoop gives you 25 g of complete protein with all nine essential amino acids, 110 calories, 0 g sugar and added electrolytes (sodium, potassium and magnesium). It is made to sip during training and active moments, not just after.

What is CellOnePro™?

CellOnePro™ is proprietary, patent-pending single cell protein technology. It starts with Saccharomyces cerevisiae, a protein-rich yeast, cultivated in a controlled fermentation. Advanced processing opens the cells, separates and concentrates the protein, and refines it for its job. The result is a highly refined, animal-free protein with all nine essential amino acids.

Why is it clear?

ISO KING CLEAR uses a hydrolyzed CellOnePro™ grade. Hydrolysis breaks larger proteins into smaller peptides, which gives the excellent solubility, light mouthfeel and minimal cloudiness a clear drink needs. So it mixes into a light, clear, fruity drink instead of a milky shake, with the same complete protein.

Is it whey protein?

No. ISO KING CLEAR is made with CellOnePro™, a hydrolyzed single cell protein isolate from yeast (Saccharomyces cerevisiae), grown by controlled fermentation. It is not whey and not from milk, and it is dairy free and lactose free.

Is it just baker's yeast?

No. CellOnePro™ starts with the same species of yeast people have used for thousands of years to bake bread and brew, but it is not ordinary baker's yeast. It is a sophisticated protein ingredient: controlled fermentation and advanced processing turn it into a concentrated, high-quality protein.

What's the difference between ISO KING CLEAR and ISO KING?

Both are powered by CellOnePro™ and give you 25 g of protein with all nine essential amino acids per serving. ISO KING CLEAR uses a hydrolyzed grade with added electrolytes for a light, fruity drink you can sip while you train. ISO KING uses a grade selected for creamy shakes, for after training or any time of day. The difference is the experience, not our commitment to quality.

Use and taste

When should I drink it?

During training and active moments: in the gym, playing sports, cycling, running or hiking. It also fits any time of day. Use it as part of a balanced diet and exercise program.

Does it replace water or a sports drink?

No. ISO KING CLEAR adds protein to the moment. Protein does not replace your hydration and electrolyte needs, so keep drinking water as you train.

Will it taste like a protein shake?

No. It is light and fruity, closer to a fruit-flavored sports drink than a thick, creamy shake. Choose from Fruit Punch, Pink Lemonade and Green Apple.

How do I mix it?

Add 1 scoop to 16 oz of cold water in a shaker bottle and shake for 20-30 seconds. Adjust the water to the flavor strength you like.

Buying

How many servings are in a tub?

About 20 servings. ISO KING CLEAR comes in one size, $49.99 per tub, and every serving is one scoop with 25 g of protein.

How fast does it ship?

We are located in Lake Mary Florida and ship everything direct from our HQ.

Does it contain allergens?

ISO KING CLEAR is dairy free, lactose free and vegan. Ingredients: Hydrolyzed Single Cell Protein Isolate (from Saccharomyces cerevisiae as CellOnePro®), Citric Acid, Natural and Artificial Flavors, Malic Acid, Magnesium Citrate, Sucralose, Potassium Chloride, Silicon Dioxide, Acesulfame Potassium, Stevia Rebaudioside M, Stevia Rebaudioside A. If you have a food allergy, read the label before use.

Is it vegan?

Yes. ISO KING CLEAR is dairy free, lactose free and vegan, and the label lists it as cholesterol free.

Who is it for?

Gym-goers who want a refreshing protein option during training. Athletes and active people who dislike thick protein shakes. Anyone who prefers fruit flavors, wants to increase their daily protein intake or is looking for a dairy-free protein source. You must be 18 years of age or older to purchase and/or use this product.

General

Do your products contain stimulants?

Some products may contain stimulants and some may not. Please review the product label and supplement facts panel before use.

Do your products contain banned substances?

We are committed to quality, but athletes with governing-body testing requirements should always review product details carefully and consult their organization’s rules before use.

Can I use your supplements if I am under 18?

You must be 18 years of age or older to purchase and/or use this product.

Can I use your supplements if I am pregnant or nursing?

If you are pregnant or nursing, consult your physician before using any dietary supplement.

What should I do if I have a medical condition or take prescription medication?

Please speak with your doctor or qualified healthcare provider before using any supplement.

How should I use your products?

Please follow the directions on the product label. Do not exceed the recommended serving size unless advised by a qualified healthcare professional.