Are Protein Bars a Healthy Snack or a Sugar-Coated Scam?
Protein bars have become a staple in British supermarkets, corner shops, and pharmacies, marketed as convenient, health-boosting snacks. Packed with muscle-building protein, fiber, and vitamins, they seem like the perfect on-the-go option. But here's where it gets controversial: are these bars as wholesome as they claim to be?
The protein bar industry is booming, valued at over £1.3 billion and growing. Yet, a growing chorus of experts, including TV fitness guru Joe Wicks, warns of their dark side. In his documentary Licensed To Kill, Wicks accuses protein bar companies of loading their products with sugar, fat, and ultra-processed ingredients. These artificial compounds, studies suggest, can increase the risk of cancer, heart disease, and dementia when consumed regularly. And this is the part most people miss: a 2025 study by Queen Mary University of London found that 37% of snack bars (including protein bars) were high in sugar, and over half were high in saturated fat—a harmful form linked to chronic health issues. Researchers concluded that consumers are being misled about the healthiness of these products.
London-based nutritionist Pippa Campbell, author of Eat Right, Lose Weight, shares this view. 'I'm not a big fan of protein bars in general,' she says. 'There's a lot of marketing around protein content, but many bars are ultra-processed and low in real nutrition. They can be useful occasionally, like when traveling, but they should never replace a balanced meal.'
However, not all protein bars are created equal. While natural protein-rich snacks like seeds, nuts, eggs, and yogurt are generally better, some bars are more nutritious than others. Campbell has evaluated several supermarket options, highlighting the best and worst choices. Let's dive in.
The Healthier Picks:
Fulfil Chocolate Salted Caramel Vitamin & Protein Bar
- Price: £2.90 for a 55-gram bar at tesco.com
- Why It Stands Out: Low in sugar (1.7 grams) and high in protein (20 grams), this bar is enriched with nine vitamins, including folic acid, vitamins E and C, and four types of vitamin B. However, it's relatively low in fiber (3.4 grams), and its sweetness comes from sugar alcohols—a highly processed ingredient.
Fast 800 Dark Chocolate Raspberry Protein Bar
- Price: £26.99 for 12 x 45-gram bars at thefast800.com
- Why It Stands Out: High in protein (14 grams) and fiber (9 grams), with an impressively low sugar content (1 gram). The fat (10 grams) is mostly natural, but it includes ultra-processed ingredients like soya protein isolate and added sweeteners.
The Protein Ball Co Blueberry Oat Muffin
- Price: £1.85 for a 45-gram bag at healthysupplies.co.uk
- Why It Stands Out: Made with natural ingredients like dates, almonds, and flax seeds, this option is enriched with vitamins B12, C, and D. While lower in protein (6.5 grams) and higher in sugar (17 grams), the sugar comes from natural sources like dates, making it a less processed choice.
Deliciously Ella Roasted Peanut Protein Ball
- Price: £1.90 for a 40-gram ball at Waitrose.com
- Why It Stands Out: Made with dates, peanuts, and peanut butter, this ball is low in calories (150) and fat (5.2 grams). Though lower in protein (4.6 grams) and higher in sugar (16 grams), the sugar is natural, and it lacks artificial sweeteners and refined oils.
Pip & Nut Dark Chocolate Peanut Protein Bar
- Price: £4 for 3 x 46-gram bars at tesco.com
- Why It Stands Out: Relatively high in protein (10 grams) and low in sugar (10 grams), this bar uses natural ingredients like peanuts and dark chocolate. However, it contains agave syrup, which is more refined than commonly thought.
The Unhealthier Picks:
Trek Power Lotus Biscoff Bar
- Price: £2.29 for a 55-gram bar at proteinpackage.co.uk
- Why It's a Concern: High in calories (239), sugar (8.9 grams), and fat (12 grams), this bar is packed with ultra-processed ingredients like candied sugar syrups, flavorings, and refined vegetable oils.
Grenade Oreo White Protein Bar
- Price: £2.70 for a 60-gram bar at tesco.com
- Why It's a Concern: While low in sugar (0.7 grams) and calories (135), this bar is ultra-processed, containing artificial sweeteners like sucralose, flavorings, and refined oils.
Food for Thought:
Protein bars can be a convenient option, but it's crucial to read labels carefully. Natural ingredients and lower processing are key. But here's a thought-provoking question: Are we too quick to label protein bars as 'healthy' just because they're marketed that way? Share your thoughts in the comments—do you think protein bars are a nutritious snack or a cleverly disguised treat?
