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Relentless Origin Energy Drink: calories, sugar and caffeine by serving
A can/bottle (500ml) of Relentless Origin Energy Drink contains 220 kcal, 51.5g of sugar and 160mg of caffeine.
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Contains sweeteners — not the same as no additivesThis drink uses in place of sugar. Low sugar does not mean nutritionally neutral. WHO 2023 guidance advises against using sweetener-containing drinks as a health strategy.
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Nutrition by serving
Nutrition by serving size: Relentless Origin Energy Drink
Serving
Calories
Sugar
Caffeine
Can/Bottle (500ml)
220 kcal
51.5g
160mg
Sugar highlighted in amber above 33% of adult daily free sugar limit (30g), red above 75%. Caffeine highlighted in amber above 25% of adult daily limit (400mg), red above 50%.
Relentless Origin Energy Drink contains 44 kcal, 10.3g of carbohydrate (10.3g sugar), 32mg of caffeine and 0.15g of salt per 100ml.
Relentless Origin contains 51.5g of sugar per 500ml can, 172% of the adult daily free sugar limit from a single can. The caffeine (160mg per 500ml) matches Monster Energy. Relentless is Coca-Cola's UK-focused energy drink brand, positioned as a premium alternative to Monster and Red Bull in the 500ml single-serve format.
UK Sugar Tax (SDIL)
Sugar Tax (SDIL)
Soft Drinks Industry Levy (upper rate: drinks above 8g sugar per 100ml). The manufacturer pays £0.24 per litre to HMRC.
Sugar
Relentless Origin Energy Drink contains 10.3g of sugar per 100ml, placing it in the upper levy band under the Soft Drinks Industry Levy. A can/bottle (500ml) delivers 51.5g of sugar, 172% of the adult daily free sugar limit.
Caffeine
Relentless Origin Energy Drink contains 32mg of caffeine per 100ml. A single can/bottle (500ml) delivers 160mg of caffeine, 40% of the adult daily limit (400mg). Drinks above 150mg of caffeine per litre must carry a 'high caffeine content' warning under UK law.
High-caffeine energy drinks are not recommended for children under 16, pregnant women or individuals sensitive to caffeine. The NHS advises pregnant women to limit total caffeine intake to 200mg per day from all sources.
What is in it
Energy drink
Carbonated water, sugar, citric acid, taurine, sodium citrate, colour (caramel E150d), caffeine, niacinamide, pantothenic acid, pyridoxine, riboflavin, cyanocobalamin. Made by Coca-Cola. A 500ml can contains 160mg caffeine and 51.5g of sugar.
Frequently asked questions
Can/Bottle (500ml): 220 kcal.
Can/Bottle (500ml): 51.5g of sugar (172% of the adult daily free sugar limit).
Can/Bottle (500ml): 160mg of caffeine (40% of the adult daily limit of 400mg).
Relentless Origin Energy Drink is subject to the Soft Drinks Industry Levy at the upper rate. The manufacturer pays £0.24 per litre to HMRC.
Relentless Origin Energy Drink is not recommended for children under 16 due to its high caffeine content (32mg per 100ml).
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Nutrition information from official brand UK nutrition panels, Coca-Cola GB nutrition pages, UK retailer product listings, and independent nutritionist analyses. Figures per 100ml; per-serving values are proportional estimates. Sugar Tax (SDIL) status based on UK sugar content thresholds at time of writing — brands may reformulate. Caffeine figures from EU/UK mandatory nutrition labelling. Reference intakes: EU Reference Intakes for an average adult (2,000 kcal). Fruit juice is subject to the SDIL if it contains added sugar; pure juices exempt. For guidance only, not medical advice.
