WHAT DRINKS ARE HIGH IN SODIUM?

When most people think about cutting back on sodium, they focus on food. Salt in cooking, processed meats, crisps, ready meals. Drinks tend to fly under the radar, yet some common beverages contain more sodium than you might expect. Whether you are trying to manage your sodium intake for health reasons or simply want a clearer picture of what you are consuming, knowing which drinks contribute to your daily sodium load is worth understanding.

If you have concerns about your sodium levels, a sodium blood test can give you a clear baseline, with no GP referral needed and lab-reviewed results delivered quickly.

Most plain water contains very little sodium, typically less than 20 mg per litre, so it is not a concern for the vast majority of people. But once you move beyond plain water, the picture changes.

Sports and electrolyte drinks are among the most significant drink sources of sodium. This is intentional. Sodium is added to these products because it stimulates thirst, encouraging you to keep drinking, and because it helps the body retain fluid during and after exercise. For most healthy people doing moderate exercise, this is not a problem. However, if you are on a low sodium diet for medical reasons, a single bottle of a standard sports drink can contain 250 mg of sodium or more, and rapid rehydration versions can contain considerably higher amounts. It is worth reading the label carefully, as sodium content varies significantly even within the same brand.

Vegetable juices are another surprising source. A standard serving of commercially produced tomato or vegetable juice can contain several hundred milligrams of sodium per serving, with some varieties exceeding 900 mg in a single glass. Low sodium versions are available but are not always clearly labelled, so checking the nutritional information is important.

Fizzy drinks are generally lower in sodium, typically containing around 30 to 50 mg per serving, but if you drink several cans a day this can add up. They are not a primary concern for most people but are worth factoring in if you are tracking your intake carefully.

Instant hot drinks, including certain hot chocolate sachets and powdered coffee mixes, can also contain meaningful amounts of sodium due to the additives and flavourings used in their production. Freshly brewed tea and coffee contain very little sodium, but pre-made bottled or canned coffee drinks are a different matter, with some containing over 200 mg per serving.

Certain cocktail mixers, particularly those used for Bloody Mary style drinks, can be very high in sodium. Tomato-based mixers are by nature sodium-rich, and commercially produced versions often contain additional salt as a preservative and flavour enhancer. A single serving of some ready-made cocktail mixes can account for a substantial portion of the recommended daily sodium intake.

Adults in the UK are advised to consume no more than 6 grams of salt per day, which is equivalent to around 2,400 mg of sodium. Most people consume more than this without realising it, largely because sodium is present in so many processed and pre-prepared foods and drinks.

For people with high blood pressure, heart disease, kidney conditions or fluid retention issues, keeping sodium intake within recommended limits is particularly relevant. Excess sodium causes the body to retain water, which increases the volume of fluid in the bloodstream and raises blood pressure. Over time, persistently high blood pressure places strain on the heart, kidneys and blood vessels.

For most healthy adults without specific medical conditions, moderate sodium consumption from drinks is unlikely to cause harm. The issue tends to arise when high-sodium drinks are consumed regularly alongside a diet that is already high in processed foods.

It is worth noting that the relationship between drinks and sodium is not always about avoiding it. Some people, particularly older adults, those recovering from illness involving vomiting or diarrhoea, or people who have been doing sustained exercise in warm conditions, may need to consider whether their sodium levels have dropped.

In these situations, oral rehydration solutions are specifically designed to restore electrolyte balance, including sodium. They are a more targeted option than standard sports drinks, which vary widely in their electrolyte content. Oral rehydration sachets dissolved in water provide a measured and appropriate amount of sodium alongside other electrolytes.

Fresh coconut water contains a modest amount of sodium as well as potassium and can be a useful drink for mild rehydration, though it is better known for its potassium content than its sodium content. Commercially processed coconut water drinks vary considerably, so checking the label is advisable.

If you suspect your sodium levels may be low rather than high, it is worth getting a blood test to understand where you actually stand before making changes to your diet or fluid intake. Symptoms of low sodium such as fatigue, confusion or muscle weakness can have many causes, and a test is the only reliable way to know whether sodium is the issue.

For most people, sodium intake from drinks is a minor part of a broader dietary picture and does not need to be monitored through blood testing. But there are situations where knowing your sodium level is genuinely useful.

If you are on a restricted sodium diet due to a medical condition and are experiencing symptoms that could indicate imbalance, a blood test can confirm whether your levels are within range. Similarly, if you have started making significant changes to your diet or fluid intake and want to understand the impact, testing gives you objective information rather than guesswork.

Sodium levels in the blood reflect how well the body is regulating fluid and electrolyte balance overall. Levels outside the normal range of approximately 135 to 145 mmol/L can point to a range of underlying issues, from medication effects to kidney or adrenal function, and are worth discussing with a GP or healthcare professional if flagged.