Protein Bar
12-Bar Gym Bag Stack
Optimum Nutrition High Protein Bar 12 x 55g — image 2 - Chocolate Berry Crunch
Optimum Nutrition

Optimum Nutrition High Protein Bar 12 x 55g

★★★★★
4.0 | 12 reviews |  12 Servings
£21.99 £24.99 £1.83/serving
18g Protein Per Bar For lifters and busy workers who need muscle support but cannot mix a shake at lunch.
Soft-Bake Texture Chewy bite from collagen, milk and whey isolate - dense yet easy to eat on the go.
12-Pack Convenience Twelve to a box - lives in the gym bag, desk drawer or kit cupboard for two weeks.
Chocolate Berry Crunch
Out of stock
Chocolate Coconut
Chocolate Sea Salt Crunch
Standard delivery
Next day (£5.99)
17,600+ Reviews
14-Day Returns
Est. 2005
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Standard Delivery 2-4 Working Days
£4.99
DPD Next Day Order by 4pm Mon-Fri
£5.99
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Food supplements should not be used as a substitute for a varied and balanced diet and healthy lifestyle. If you are pregnant, breastfeeding, taking medication, or under medical supervision, consult your doctor before use. Do not exceed the recommended daily intake. Store out of reach of children.

Chocolate Berry Crunch Out of stock
Chocolate Coconut
Chocolate Sea Salt Crunch

Optimum Nutrition High Protein Bar - 18g protein per bar

Each 55g Optimum Nutrition High Protein Bar delivers 18g of protein from a collagen hydrolysate, milk protein and whey blend at 221kcal, with 20g of carbohydrates, 10g of fat and just 1.9g of sugar. The soft-baked chocolate-coated format gives a different texture to the standard extruded protein bar. The 12-bar pack covers approximately two weeks at one bar a day.

The three-source protein blend - collagen hydrolysate, milk protein and whey - covers both structural (collagen, providing hydroxyproline and glycine) and muscle-building (whey leucine fractions and complete milk protein) amino acid contributions. Protein contributes to the growth and maintenance of muscle mass, and the bar format makes that contribution practical when a shaker is not realistic. At 1.9g sugar the bar avoids the heavy sweetness that makes many protein bars feel more like confectionery than sports nutrition.

The 55g soft-baked format is lighter than the 65g bar variant - useful for anyone who finds larger bars heavy mid-day or who prefers a smaller snack between meals rather than a post-workout serve. At 18g protein it is still a meaningful top-up rather than a token amount. The 12-bar pack is a sensible stash size for a gym bag, desk drawer or car.

Built for lifters, busy professionals and commuters who use portable protein as a regular part of their daily routine rather than an occasional backup. Not a low-calorie snack at 221kcal and 10g fat. Contains milk, soy, egg, wheat and gluten. Suitable for people with nut concerns - check label for full allergen information.

Alternatives: Applied Critical Whey 2.2kg (24g protein/130kcal per scoop) for a shake format with higher protein density, or Efectiv Whey Concentrate (23g/114kcal) as a value-tier daily protein option.

Key Benefits

18g Protein Per Bar

18g of protein in a 55g bar provides a meaningful protein contribution to your daily intake in a convenient, no-prep format that works anywhere.

Compact & Portable

At 55g, this bar is lighter and more compact than many competitors, making it easier to carry in a jacket pocket, gym bag, or desk drawer without bulk.

Snack-Style Format

Caramel and chocolate textures make this a satisfying alternative to confectionery, helping athletes stick to high-protein diets without feeling restricted.

Box of 12 Value

12 bars per box reduces cost per bar and ensures you always have a protein source available - reducing the risk of falling short on protein during busy days.

Frequently Asked Questions

How much protein is in an Optimum Nutrition High Protein Bar?

Each 55g Optimum Nutrition High Protein Bar provides 18g of protein from a blend of collagen hydrolysate, milk protein and whey protein. At 221kcal per bar with 20g carbs and 10g fat, it slots in as a balanced snack rather than a low-calorie option. Protein contributes to the growth and maintenance of muscle mass.

When is the best time to eat an Optimum Nutrition High Protein Bar?

An Optimum Nutrition High Protein Bar works best when you eat it in a slot that fits your day - post-workout, between meals or on busy travel days when a shake is not practical. Consistent daily intake matters more than timing, so use the bar to plug protein gaps rather than chase a well-suited window.

Who is the Optimum Nutrition High Protein Bar best suited to?

The Optimum Nutrition High Protein Bar is best suited to lifters, gym-goers and active people who want a portable protein snack without preparation. It is also useful for office workers or travellers who struggle to hit daily protein targets with whole-food meals alone. Contains milk, soy and gluten, so check allergens before buying.