For an ordinary 5k in normal conditions, choose no-added-sugar cordial if you enjoy it as a diluted drink, not because you expect it to fuel the run. The no-added-sugar examples below contain little carbohydrate when prepared as directed; regular cordial contains more, but that alone does not make it a sports drink. Longer or hotter sessions call for a fresh look at your fluid and food needs.
Whether cordial is useful around a 5k depends on whether you want a drink you enjoy, are looking for carbohydrate, or are planning a more demanding session.
If plain water is unappealing before or after a 5k, a no-added-sugar cordial diluted as directed offers flavour without treating the drink as running fuel. The NHS advises diluting squash and cordial well and identifies water as a way to replace fluids lost through activity.
Check carbohydrate in the prepared drink rather than relying on words such as ‘diet’ or ‘regular’. Regular cordial can contain more carbohydrate than a no-added-sugar version, but the choice still needs to fit the duration and demands of your run.
A 5k that forms part of a longer training session, or a run in heat with substantial sweating, calls for a more individual look at fluid and food. The American College of Sports Medicine says most people exercising for less than 60–90 minutes in normal weather are unlikely to become dehydrated or depleted of electrolytes; those conditions do not describe every session.
Start with the purpose of the drink, then compare nutrition on the same prepared-drink basis and check the bottle you will actually use.
| Priority | What to check | Your needs |
|---|---|---|
| Fuel or flavour | Read carbohydrate per 100ml of diluted drink. Tesco Groceries lists 0.1g for Tesco Lime Cordial prepared as directed; Waitrose & Partners lists 0.6g for Belvoir Lemon & Lime No Added Sugar Cordial diluted 1:6. | I want flavour around a standard 5k, rather than assuming a no-added-sugar drink will supply running fuel. If the session extends beyond the 5k, I need to consider food and drink in the context of the whole session. |
| Regular cordial | Compare sugar and carbohydrate at the stated dilution. Waitrose & Partners lists 4.4g of each per 100ml for Rocks Blackcurrant Squash diluted 1:8; more carbohydrate than the no-added-sugar examples does not establish that it meets a particular running need. | If I prefer regular cordial, I want to know what is in the drink I prepare, without treating its sweetness as a reason to buy it for a normal 5k. |
| Fluid routine | Follow the bottle’s dilution directions and consider the run’s duration, weather and sweating. The NHS advises extra fluids after sweating through physical activity and recommends diluting cordial well. | My main aim may simply be a drink I will make and enjoy before or after running; a hotter or longer session needs a separate look at fluids. |
| Current label | Check ingredients, sweeteners, allergens, nutrition and storage directions on the bottle. Compare nutrition per 100ml only when the products use the same prepared-drink basis. | I avoid a particular ingredient or need an exact carbohydrate figure, so the current bottle matters more to my choice than a product-family name. |
The prepared Tesco and Belvoir no-added-sugar examples list 0.1g and 0.6g carbohydrate per 100ml respectively. Those figures make them poor substitutes for food when a session genuinely calls for carbohydrate.
Choose them for a flavour you like, and consider meals or snacks separately when planning longer or harder training.
Labels can use different dilution ratios: Waitrose & Partners states 1:6 for Belvoir Lemon & Lime No Added Sugar Cordial and 1:8 for Rocks Blackcurrant Squash. Figures from differently prepared drinks are not directly comparable.
Follow each bottle’s instructions, then compare carbohydrate and sugars per 100ml of the diluted drink or the same ready-to-drink serving size.
Rocks Blackcurrant Squash lists more carbohydrate per 100ml diluted than the no-added-sugar examples, but that figure alone cannot establish what a runner needs during a particular event.
For a normal 5k, choose regular cordial for its flavour if you want it. For a longer or hotter session, consider the full session’s fluid and food needs rather than sweetness alone.
A recipe change can affect whether a drink meets an ingredient preference or an exact nutrition requirement.
Read the current bottle for ingredients, allergens, sweeteners, dilution and storage instructions, particularly if an ingredient affects what you can drink.
These examples show why the prepared drink and its particular label matter more than a brand name alone.
Its No Added Sugar Summer Fruits squash is a flavoured-drink option rather than a demonstrated source of 5k fuel. Joybuy lists 2 kcal per 100ml diluted for this 1L product.
Tesco Lime Cordial illustrates a no-added-sugar concentrate for shoppers comparing the prepared drink.
Belvoir Lemon & Lime No Added Sugar Cordial provides another prepared-drink comparison for the flavoured-water route.
Rocks Blackcurrant Squash is a regular cordial example for comparing sugar-containing and no-added-sugar drinks, not a substitute selected for a particular runner’s fuelling plan.
These Robinsons concentrates are options for flavouring water around a 5k; choose by flavour and the details on the prepared drink, not by assuming they provide running fuel.
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This no-added-sugar pink grapefruit squash is a flavoured-drink choice for around an ordinary 5k, rather than a substitute for food-based fuel.
Check the current ingredients for barley and sulphites if either matters to you, and prepare the drink according to the bottle.
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Choose this lemon squash if you prefer a no-added-sugar flavour in a drink around your run.
For an exact carbohydrate comparison, read the prepared-drink panel on the current bottle. Check its sulphite and phenylalanine information if relevant to you.
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This orange squash offers a no-added-sugar option when flavour is your reason for choosing cordial around a 5k.
Check the current bottle for diluted carbohydrate information if you need a precise figure, and for sulphites if relevant.
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This summer-fruits squash is a flavoured-drink option, not a reason to rely on cordial for 5k fuel.
Joybuy lists 2 kcal per 100ml diluted. Follow the bottle’s dilution directions and check its carbohydrate and sulphite information if those details affect your choice.
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This no-added-sugar fruit squash is an option if you prefer pineapple, mango and passion-fruit flavours in your diluted drink.
For a carbohydrate comparison with other cordials, check that the current bottle’s nutrition figures refer to the drink as prepared.
Do not rely on it for carbohydrate fuel: Tesco Groceries lists 0.1g carbohydrate per 100ml of its Lime Cordial prepared as directed, while Waitrose & Partners lists 0.6g per 100ml of prepared Belvoir Lemon & Lime No Added Sugar Cordial. For an ordinary 5k, treat these as flavoured drinks. The American College of Sports Medicine says most people exercising for less than 60–90 minutes in normal weather are unlikely to become dehydrated or depleted of electrolytes, though individual sessions differ.
No. Waitrose & Partners lists 0.6g carbohydrate and 0.4g sugars per 100ml diluted for Belvoir Lemon & Lime No Added Sugar Cordial, and 0.3g of each per 100ml diluted for Vimto No Added Sugar Squash. Check the prepared-drink figures rather than interpreting the name as a zero-carbohydrate claim.
Do not assume it can. Waitrose & Partners lists 4.4g carbohydrate per 100ml of Rocks Blackcurrant Squash diluted as directed, but its carbohydrate figure alone does not establish the fluid or food needs of your run. Consider the full duration and conditions of your session instead of choosing by sugar content alone.
Read the current ingredients, allergens, sweeteners, dilution directions and nutrition basis, particularly if an ingredient or precise carbohydrate intake matters to you. GOV.UK says food businesses must tell consumers about any of 14 regulated allergens when they are ingredients in a food or drink product.