70 protein bars analysed using SpikeSaver. From ultra-processed ingredients to hidden sugars — here's what we found.
93% of Tesco protein bars are ultra-processed.
Not one passed a clean-ingredient test.
Based on real Tesco.com product data across 18 brands.
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NOVA Classification Report
93% of the 70 protein bars analysed are ultra-processed (NOVA 4). The average product contains 10 UPF markers. Not a single product passed a clean-ingredient test.
All 70 protein bars analysed →
Protein Quality Report
Grenade and Fulfil lead at 35–38g protein per 100g. But the best value? Warrior RAW at 26.8g of protein per £1. We ranked every bar by protein per 100g, per calorie, and per pound.
All 70 protein bars analysed →
Net Carbs Report
Only 2 out of 70 protein bars qualify as keto-friendly with under 10g net carbs. 17 bars are carb traps — over 30g net carbs despite protein marketing.
All 70 protein bars analysed →
Sugar & Glucose Report
19 products hide sugar under 3 or more different names. One product uses 6 different sugar aliases. Plus GI scores for 68 bars — some "healthy" bars spike glucose harder than a biscuit.
All 70 protein bars analysed →
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