Cellucor C4 Whey Protein, front of container

C4 Whey Protein, 28 Serving size, Reeses PB Cup flavor

C4 Whey Protein, 28 Serving size, Vanilla flavor

C4 Whey Protein, 66 Serving size, Hershey's Chocolate flavor

C4 Whey Protein, 66 Serving size, Reeses PB Cup flavor

C4 Whey Protein, 66 Serving size, Vanilla flavor

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C4 Whey Protein — 25g Protein, Official Hershey's and Reese's Flavours

1 review

C4 Whey Protein25 grams of protein at 130 to 140 calories, from a whey concentrate and isolate blend. The flavour range includes officially licensed Hershey's Milk Chocolate and Reese's Peanut Butter Chocolate.This is a flavour-first protein, and we would rather tell you that plainly than dress it up as something else.Read the ingredient order — it tells you what you are buyingThis is a skill worth having for any protein powder, and this product is a good place to learn it.Ingredients are listed by weight, heaviest first. On C4 Whey the list begins whey protein concentrate, whey protein isolate — in that order.That tells you concentrate is the dominant source and isolate is the smaller portion. It is not hidden and it is not dishonest; it is simply what the label says, and most people never think to look.Why it matters: Whey concentrate is roughly 80% protein by weight. The remaining 20% is where lactose, fat and carbohydrate live. It is the cheaper fraction, and it carries more flavour and a creamier texture Whey isolate is filtered further, stripping most of the lactose and fat out. More expensive, leaner, thinnerA concentrate-led blend gives you 25g of protein at 130 to 140 calories. An isolate-led product gives you the same 25g at around 110. That 20 to 30 calorie gap is the concentrate, and it comes with better taste and texture.Neither is better in the abstract. But now you can look at any tub and know which you are getting.The flavours are the actual reason to buy thisC4 secured genuine licensing partnerships rather than approximating popular flavours, and that is unusual.Hershey's Milk Chocolate and Reese's Peanut Butter Chocolate are official collaborations. The Reese's version uses partially defatted peanut flour rather than peanut flavouring, which is why it tastes closer to the real thing.Vanilla Bean is the third option and is not a collaboration.If you have abandoned protein powders because they taste artificial, this is a reasonable place to look — and the concentrate-led blend is part of why they taste the way they do. The two facts are connected.⚠ The Reese's flavour contains peanutsWorth stating separately, because allergens here are flavour-specific.Reese's Peanut Butter Chocolate contains peanuts alongside milk. Hershey's Milk Chocolate and Vanilla Bean contain milk only.If you have a peanut allergy, check which tub you are picking up — the difference is not obvious from the packaging.Specs Protein25g per serving Calories130–140 depending on flavour Carbohydrate2–4g Sugar1–2g, zero added sugar Fat2g Protein sourcesWhey concentrate (primary), whey isolate SweetenersSucralose, acesulfame potassium Sizes2 lb (28 servings), 5 lb (66 servings) ⚠ AllergensMilk. Reese's flavour also contains peanutsThe 5 lb tub at 66 servings is materially better value than two 2 lb tubs. If you have found a flavour you like, buy the larger size.Sunflower lecithin is used as the instantising agent rather than soy lecithin, which is a small but genuine plus for anyone avoiding soy.Where it sits against our other proteins C4 Whey25g / 130–140 calConcentrate-led. Best flavours, creamiest NutraBio Isolate25g / 110 calPure isolate, lot-number lab results Nutristat Bio Whey25g / 110–119 calZero lactose, serum protein fraction Rule One R1 Protein25g / 110 calIsolate and hydrolysate, Informed ChoiceThe honest guide: if you are cutting hard, lactose sensitive, or counting every calorie, the isolate options are better suited. If taste is what keeps you consistent — and for a lot of people it genuinely is — C4 is the one you will actually finish. A protein you enjoy and drink daily beats a leaner one sitting unopened in a cupboard.How to mix it One serving in 6 ounces of water, milk or a dairy alternative. Shake well. Water keeps it lean; milk makes it noticeably richer at the cost of extra calories. Good in oats, yoghurt and smoothies, and the concentrate content makes it better for baking than a pure isolate — concentrate holds moisture where isolate dries out. Any time of day. Total daily protein matters more than timing.Who this is for Anyone who has given up on protein powders because of the taste People who want a creamier, thicker shake than an isolate provides Anyone baking with protein — concentrate performs better than isolate People buying in bulk, given the 66-serving option Anyone avoiding soy lecithinWho this is not forIf you are lactose sensitive, this is not the one. Concentrate is where the lactose lives. Bio Whey is zero lactose and NutraBio Isolate is under 1g.If you are cutting and counting calories closely, an isolate saves you 20 to 30 calories for the same protein.If you have a peanut allergy, avoid the Reese's flavour.If you avoid artificial sweeteners, this uses sucralose and acesulfame potassium.If you are a tested athlete, C4 Whey does not carry a banned-substance certification. Rule One R1 Protein is Informed Choice certified.Stack it with: creatine, which mixes in without affecting flavour. See our creatine range.Frequently asked questionsIs C4 Whey isolate or concentrate?Both, but concentrate is the primary source — the ingredient list names it first, and ingredients are listed by weight. Isolate is the smaller portion.Why does it have more calories than an isolate?Concentrate is roughly 80% protein; the remaining 20% is lactose, fat and carbohydrate. That is the 20 to 30 calorie difference, and it is also what makes it taste better.Are the Hershey's and Reese's flavours official?Yes, genuine licensing partnerships. The Reese's version uses partially defatted peanut flour rather than peanut flavouring.Does it contain peanuts?The Reese's flavour does. Hershey's Milk Chocolate and Vanilla Bean contain milk only. Allergens here are flavour-specific.Is it good if I am lactose intolerant?Not especially. Concentrate carries the lactose. A pure isolate is the better choice.Can I bake with it?Yes, and better than a pure isolate — concentrate holds moisture where isolate tends to dry baked goods out.Which size is better value?The 5 lb at 66 servings, comfortably, compared with two 2 lb tubs.Is it third-party tested for banned substances?No certification is listed. If you compete in a tested federation, choose an Informed Choice or Informed Sport certified protein. Read more

Size: 28 Serving

Flavor: Hershey's Chocolate

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$ 44.99

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PRODUCT LABEL

C4 Whey Protein

25 grams of protein at 130 to 140 calories, from a whey concentrate and isolate blend. The flavour range includes officially licensed Hershey's Milk Chocolate and Reese's Peanut Butter Chocolate.

This is a flavour-first protein, and we would rather tell you that plainly than dress it up as something else.

Read the ingredient order — it tells you what you are buying

This is a skill worth having for any protein powder, and this product is a good place to learn it.

Ingredients are listed by weight, heaviest first. On C4 Whey the list begins whey protein concentrate, whey protein isolate — in that order.

That tells you concentrate is the dominant source and isolate is the smaller portion. It is not hidden and it is not dishonest; it is simply what the label says, and most people never think to look.

Why it matters:

Whey concentrate is roughly 80% protein by weight. The remaining 20% is where lactose, fat and carbohydrate live. It is the cheaper fraction, and it carries more flavour and a creamier texture
Whey isolate is filtered further, stripping most of the lactose and fat out. More expensive, leaner, thinner

A concentrate-led blend gives you 25g of protein at 130 to 140 calories. An isolate-led product gives you the same 25g at around 110. That 20 to 30 calorie gap is the concentrate, and it comes with better taste and texture.

Neither is better in the abstract. But now you can look at any tub and know which you are getting.

The flavours are the actual reason to buy this

C4 secured genuine licensing partnerships rather than approximating popular flavours, and that is unusual.

Hershey's Milk Chocolate and Reese's Peanut Butter Chocolate are official collaborations. The Reese's version uses partially defatted peanut flour rather than peanut flavouring, which is why it tastes closer to the real thing.

Vanilla Bean is the third option and is not a collaboration.

If you have abandoned protein powders because they taste artificial, this is a reasonable place to look — and the concentrate-led blend is part of why they taste the way they do. The two facts are connected.

⚠ The Reese's flavour contains peanuts

Worth stating separately, because allergens here are flavour-specific.

Reese's Peanut Butter Chocolate contains peanuts alongside milk. Hershey's Milk Chocolate and Vanilla Bean contain milk only.

If you have a peanut allergy, check which tub you are picking up — the difference is not obvious from the packaging.

Specs

Protein	25g per serving
Calories	130–140 depending on flavour
Carbohydrate	2–4g
Sugar	1–2g, zero added sugar
Fat	2g
Protein sources	Whey concentrate (primary), whey isolate
Sweeteners	Sucralose, acesulfame potassium
Sizes	2 lb (28 servings), 5 lb (66 servings)
⚠ Allergens	Milk. Reese's flavour also contains peanuts

The 5 lb tub at 66 servings is materially better value than two 2 lb tubs. If you have found a flavour you like, buy the larger size.

Sunflower lecithin is used as the instantising agent rather than soy lecithin, which is a small but genuine plus for anyone avoiding soy.

Where it sits against our other proteins

C4 Whey	25g / 130–140 cal	Concentrate-led. Best flavours, creamiest
NutraBio Isolate	25g / 110 cal	Pure isolate, lot-number lab results
Nutristat Bio Whey	25g / 110–119 cal	Zero lactose, serum protein fraction
Rule One R1 Protein	25g / 110 cal	Isolate and hydrolysate, Informed Choice

The honest guide: if you are cutting hard, lactose sensitive, or counting every calorie, the isolate options are better suited. If taste is what keeps you consistent — and for a lot of people it genuinely is — C4 is the one you will actually finish. A protein you enjoy and drink daily beats a leaner one sitting unopened in a cupboard.

How to mix it

One serving in 6 ounces of water, milk or a dairy alternative. Shake well.
Water keeps it lean; milk makes it noticeably richer at the cost of extra calories.
Good in oats, yoghurt and smoothies, and the concentrate content makes it better for baking than a pure isolate — concentrate holds moisture where isolate dries out.
Any time of day. Total daily protein matters more than timing.

Who this is for

Anyone who has given up on protein powders because of the taste
People who want a creamier, thicker shake than an isolate provides
Anyone baking with protein — concentrate performs better than isolate
People buying in bulk, given the 66-serving option
Anyone avoiding soy lecithin

Who this is not for

If you are lactose sensitive, this is not the one. Concentrate is where the lactose lives. Bio Whey is zero lactose and NutraBio Isolate is under 1g.

If you are cutting and counting calories closely, an isolate saves you 20 to 30 calories for the same protein.

If you have a peanut allergy, avoid the Reese's flavour.

If you avoid artificial sweeteners, this uses sucralose and acesulfame potassium.

If you are a tested athlete, C4 Whey does not carry a banned-substance certification. Rule One R1 Protein is Informed Choice certified.

Stack it with: creatine, which mixes in without affecting flavour. See our creatine range.

Frequently asked questions

Is C4 Whey isolate or concentrate?
Both, but concentrate is the primary source — the ingredient list names it first, and ingredients are listed by weight. Isolate is the smaller portion.

Why does it have more calories than an isolate?
Concentrate is roughly 80% protein; the remaining 20% is lactose, fat and carbohydrate. That is the 20 to 30 calorie difference, and it is also what makes it taste better.

Are the Hershey's and Reese's flavours official?
Yes, genuine licensing partnerships. The Reese's version uses partially defatted peanut flour rather than peanut flavouring.

Does it contain peanuts?
The Reese's flavour does. Hershey's Milk Chocolate and Vanilla Bean contain milk only. Allergens here are flavour-specific.

Is it good if I am lactose intolerant?
Not especially. Concentrate carries the lactose. A pure isolate is the better choice.

Can I bake with it?
Yes, and better than a pure isolate — concentrate holds moisture where isolate tends to dry baked goods out.

Which size is better value?
The 5 lb at 66 servings, comfortably, compared with two 2 lb tubs.

Is it third-party tested for banned substances?
No certification is listed. If you compete in a tested federation, choose an Informed Choice or Informed Sport certified protein.