Choose no-added-sugar cola for its flavour, not as the carbohydrate fuel for a long run: Coca-Cola Great Britain and Pepsi UK list 0 g carbohydrate for Coca-Cola Zero Sugar and Pepsi MAX respectively, while World Athletics gives carbohydrate-intake guidance for longer endurance events. If you want to avoid caffeine, choose a version explicitly labelled caffeine-free. Plan any carbohydrate and fluid you need for running separately, and check how your chosen drinks fit your training routine.
The useful distinction is whether you want cola as a drink you enjoy or need carbohydrate during exercise.
If you enjoy cola during everyday training, check its nutrition panel without counting a zero-carbohydrate version towards your long-run fuel. World Athletics’ endurance guidance concerns carbohydrate intake during longer events, which needs its own plan.
A no-sugar label does not tell you whether a cola contains caffeine. Coca-Cola Great Britain and Pepsi UK identify separate caffeine-free versions of Coca-Cola Zero Sugar and Pepsi MAX; check the exact pack name when choosing.
If a sweetener or phenylalanine warning matters to you, read the ingredient list on the pack you buy. Tesco and Sainsbury’s both caution that ingredients and nutrition information can change.
Decide what will provide carbohydrate during long sessions first. Then choose a cola by its sugar, caffeine and ingredient labels.
Choose when: You want cola flavour as refreshment and have arranged any running fuel separately.
Trade-off: The zero-carbohydrate Coca-Cola Zero Sugar and Pepsi MAX products described by their brands cannot provide carbohydrate for a long run.
Choose when: Your long-run plan calls for carbohydrate during exercise, whether from a suitable drink, gels or food.
Trade-off: Work out the amount and format that fit your session and practise using them in training; a cola chosen for flavour does not answer that need.
| Priority | What to check | Your needs |
|---|---|---|
| Long-run fuel | Read carbohydrate per serving on the exact product. World Athletics gives 30–60 g per hour for endurance events lasting 1–2.5 hours and up to 90 g per hour for events over 2.5 hours; use its guidance in the context of your own plan. | For a long session, I need to account for carbohydrate separately rather than assume a no-sugar cola will supply it. |
| Cola and sugar | Compare both sugars and carbohydrate on the nutrition panel. Coca-Cola Great Britain lists 0 g of each for Coca-Cola Zero Sugar, and Pepsi UK lists 0 g of each per 330 ml can of Pepsi MAX. Check the figures on the pack you choose. | I want cola flavour without using the drink as my running fuel. |
| Caffeine | Look for an explicit caffeine-free name. The standard Coca-Cola Zero Sugar and Pepsi MAX ingredient information lists caffeine, while their brands identify separate caffeine-free versions. | If caffeine does not fit my routine, I want to know that the particular cola I pick is caffeine-free. |
| Ingredients | Read the current ingredient list and any phenylalanine warning, particularly if you have an ingredient-specific requirement. Do not assume two zero-sugar variants use the same recipe. | I need the exact pack, rather than just the front-of-pack sugar claim, to match my requirements. |
| Drinking during runs | Consider whether you want a carbonated drink during exercise and try any intended race-day drink in training. The NHS notes that carbonated drinks are associated with dental erosion because of their acid content, with or without sugar. | I would rather find out during training whether fizzy cola fits my routine than rely on it for the first time during an event. |
Coca-Cola Great Britain and Pepsi UK list 0 g carbohydrate for Coca-Cola Zero Sugar and Pepsi MAX respectively. Those drinks do not provide the carbohydrate addressed in World Athletics’ guidance for longer endurance events.
Check carbohydrate grams on the exact pack and plan a separate source when your session calls for fuel.
The standard Coca-Cola Zero Sugar and Pepsi MAX ingredient information lists caffeine; their caffeine-free versions are distinct products.
If avoiding caffeine matters, look for “caffeine-free” on the particular bottle or can.
A sugar claim does not describe every sweetener or warning on a pack. Tesco and Sainsbury’s caution that product ingredients can change.
Check the current label for sweeteners and phenylalanine warnings whenever those details affect your choice.
According to the NHS, carbonated drinks are associated with dental erosion due to their acid content regardless of whether they contain sugar.
Do not treat a zero-sugar label as an answer to every question about drinking cola around training.
These brand and retailer examples help distinguish published nutrition information and caffeine options; they do not establish that every variant has the same recipe.
Coca-Cola Great Britain publishes nutrition information for Coca-Cola Zero Sugar and identifies a separate caffeine-free version.
Pepsi UK publishes a nutrition panel for Pepsi MAX and identifies Pepsi MAX No Caffeine as a separate no-sugar option.
Tesco describes its Diet Cola as a no-added-sugar own-label option.
Sainsbury’s describes Cola Zero as a low-calorie cola with sweeteners.
These cola packs are choices to consider for refreshment alongside a separate long-run fuelling plan. The selection includes a caffeine-free option; check each pack’s nutrition and ingredients against what you need.
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Consider this pack if caffeine avoidance is part of your cola choice; it is not a substitute for planned long-run fuel.
Check the pack’s carbohydrate figure, sweeteners and any phenylalanine warning against your requirements.
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This bottled cola is a refreshment choice when carbohydrate for a long run is covered separately.
Standard Pepsi MAX lists caffeine in Pepsi UK’s ingredient information. Check the nutrition and ingredient details on this pack.
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If you prefer Diet Coke, assess it as a cola choice rather than assuming it will provide your running fuel.
Read this pack’s carbohydrate, caffeine and sweetener information before fitting it into your routine.
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Choose this cola for flavour preferences, with any long-run carbohydrate planned separately.
Coca-Cola Great Britain lists 0 g carbohydrate and 0 g sugars for Coca-Cola Zero Sugar. Its standard version lists caffeine flavouring; check this pack if caffeine or particular ingredients matter to you.
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This cherry-flavoured cola is another refreshment option, not a replacement for planned carbohydrate during long sessions.
Check the Cherry variant’s own nutrition and ingredient label rather than assuming it matches standard Pepsi MAX.
Do not rely on a zero-carbohydrate cola for carbohydrate fuel. Coca-Cola Great Britain and Pepsi UK list 0 g carbohydrate for Coca-Cola Zero Sugar and Pepsi MAX respectively; World Athletics gives guidance of 30–60 g carbohydrate per hour for endurance events lasting 1–2.5 hours and up to 90 g per hour for events over 2.5 hours. Plan a separate carbohydrate source when your session requires one.
Yes. The Australian Institute of Sport describes sports drinks as designed to provide carbohydrate and fluid together, unlike the zero-carbohydrate colas described here. If a drink is part of your long-run fuel plan, check its carbohydrate content and practise using it in training; gels or food may also be part of a separately planned approach.
Coca-Cola Great Britain identifies Coca-Cola Zero Sugar Caffeine Free, and Pepsi UK identifies Pepsi MAX No Caffeine. Check the exact pack name: the brands’ standard Coca-Cola Zero Sugar and Pepsi MAX ingredient information lists caffeine.
Read the ingredients and warnings on the exact pack before choosing it, particularly if you have phenylketonuria (PKU) or another ingredient-specific requirement. A no-sugar claim alone does not tell you which sweeteners a product contains, and recipes can change.
No. The NHS says carbonated drinks are associated with dental erosion because of their acid content regardless of whether they contain sugar. The sugar figure is useful for choosing a cola, but it does not describe its acidity.