Joybuy Insights

Choosing protein bars: how to compare protein, sugar and convenience

At first glance, choosing a protein bar seems straightforward. However, protein bars vary considerably in protein content, sugar, sweeteners, portion size and ingredients. Eye-catching packaging or the term “high-protein snack” says little on its own about whether a product is suitable for your particular eating occasion.

Adults who exercise, do fitness training or are often on the go are especially likely to make three common purchasing mistakes:

  • Mistaking a low-sugar claim for a low-calorie product. A bar may contain little sugar but still be relatively high in fat, polyols or calories.
  • Failing to compare protein content per bar. Some packaging shows values per 100 grams, even though the bar itself may be much smaller or larger.
  • Overlooking ingredients and allergens. Milk, soya, peanuts, nuts, gluten and collagen are regularly found in high-protein snacks.

A protein bar is not a replacement for a varied diet, either. Think of it as a practical addition for when you’re on the go, between meals or after exercising.

What should you look for in protein bars?

1. Compare the protein content per serving

First, check the nutritional value per bar, not just the value per 100 grams. A 55-gram serving containing 20 grams of protein is not directly comparable with a 74-gram bar containing 25 grams of protein.

For a protein bar after exercise or a protein bar for when you’re out and about, these points are useful to consider:

  • How many grams of protein does one bar contain?
  • How much does the serving weigh?
  • Is the protein sourced from milk, whey, soya, collagen or a combination?
  • Does the serving fit into your daily diet?

Under European nutrition claim regulations, a product may, subject to certain conditions, be labelled “high in protein”. This does not automatically mean that the product is low in sugar, low in calories or suitable for every athlete. Always check the full label.

2. Consider sugar, polyols and calories together

When looking for a low-sugar protein bar, people often focus only on the line stating “of which sugars”. That is too narrow a view. Many bars use sweeteners such as maltitol, sorbitol, erythritol or sucralose. Excessive consumption of polyols may have a laxative effect; this warning also appears on various products in the range.

Compare the following per bar:

  • sugar in grams;
  • total carbohydrates;
  • polyols;
  • calories;
  • fat and saturated fat.

For example, a bar containing 1.5 grams of sugar may still contain around 200 kcal. Barebells Caramel & Cashew lists 20 grams of protein, 1.5 grams of sugar, 3.1 grams of fibre and 200 kcal per bar. This makes it interesting for anyone looking to limit sugar, but it is not automatically low in calories.

3. Check allergens and dietary preferences

Read the allergens highlighted in bold on the packaging. The selected protein bars include milk, soya, peanuts, cashew nuts, hazelnuts, gluten and eggs, among others. Not every bar is vegetarian, either: some varieties contain hydrolysed collagen.

Also pay attention to practical details:

  • Individual wrapper for a protein bar when you’re on the go;
  • multipack if you use a bar regularly;
  • cool, dry storage according to the label;
  • best-before date and any recipe changes;
  • grams of protein per pound when there is a protein bar offer.

A protein bar variety pack is useful when you want to try different flavours, but check the nutritional values for each variety. The bars in a mixed box may differ from one another.

Which protein bar suits your needs?

Suitable for: Budget-conscious beginners
Bites We Love Chewy Oat Bars Vanilla - 4 pieces

Bites We Love Chewy Oat Bars Vanilla - 4 pieces

Why it suits this profile: An accessible snack with a soft texture for anyone who wants to try different types of bars without immediately buying a large protein bar variety pack.

How this product avoids the pitfall

The product information clearly highlights oats, fibre and seeds. This is not a classic protein bar, so you should take extra care to check the nutritional value per serving.

Main benefit & advantages

Four pieces per pack, a soft oat snack and clearly stated storage instructions.

Suitable for: Buyers looking for premium quality
Optimum Nutrition Whipped Protein Bar Peanut & Salted Caramel 68g x 10 bars

Optimum Nutrition Whipped Protein Bar Peanut & Salted Caramel 68g x 10 bars

Why it suits this profile: A multipack of 10 bars for anyone who regularly enjoys a high-protein snack at the office, in the car or after training.

How this product avoids the pitfall

The product information states 20 grams of protein per bar and lists milk, soya and peanuts as allergens. This allows you to assess the serving and suitability in advance.

Main benefit & advantages

10 x 60 grams, 20 grams of protein per bar and a soft texture with peanut and caramel flavour.

Suitable for: Specific uses & intensive users
Xxl Nutrition High Protein Bar Chocolate - 50 g

Xxl Nutrition High Protein Bar Chocolate - 50 g

Why it suits this profile: For users who want to combine a high amount of protein per serving with a low stated sugar content.

How this product avoids the pitfall

The product specification lists 25 grams of protein and 0.7 grams of sugar per bar. Do check the allergens, however: milk, soya, peanuts and gluten are listed.

Main benefit & advantages

50 grams per bar, 25 grams of protein and 179 kcal according to the stated product information.

Suitable for: Variety seekers and stock-up shoppers
Nutramino & Optimum Nutrition Protein Bar Variety Bundle – 5 bars

Nutramino & Optimum Nutrition Protein Bar Variety Bundle – 5 bars

Why it suits this profile: Handy if you want to compare flavours or need a protein bar at several points during the week.

How this product avoids the pitfall

The bundle identifies the individual bars and flavours. Nutritional values differ between varieties, so check each package before making your choice.

Main benefit & advantages

Five bars, several flavours and Nutramino varieties containing 25 grams of protein per 74 grams.

Looking for more options?

We’ve put together a complete, up-to-date list of products that fully meet these strict selection criteria and the applicable European safety regulations.

Frequently asked questions about protein bars

Are protein bars suitable as a post-workout protein bar?

That depends on your overall diet and the type of training you do. A bar containing 20 to 25 grams of protein can be a practical choice after exercise or between meals. Also check the calories, carbohydrates and ingredients. According to their own product information, some brands position certain bars specifically for use after exercise; this is usage advice from the brand and does not indicate a medical effect.

How long can you keep protein bars?

Follow the best-before date and storage instructions on the packaging. Most products should be stored in a cool, dry place away from direct sunlight. Do not leave a bar in a hot car for a prolonged period. Check the packaging before eating and do not use a product if the packaging is damaged.

Are low-sugar protein bars always good value?

Not always. Compare the price per bar, the protein content per serving and the number of bars in the pack. A multipack may reduce the price per item, but it is only good value if you actually use the bars. Also look at polyols and calories, so that a low sugar value does not become your only criterion.