Salt in Your Diet: How Much Is Too Much, and Where It's Really Hiding

The average UK adult eats around 8.4g of salt every day, nearly 40% more than their heart needs. According to NHS guidance, adults should consume no more than 6g of salt per day, and the inconvenient truth is that roughly 75% of that excess isn't coming from anything you sprinkle yourself.

What NHS Guidance Says About Daily Salt Intake

The NHS recommends a maximum of 6g of salt per day for adults, roughly one level teaspoon. Children need considerably less: just 2g for those under three, rising to 5g for those aged 7–10. These limits exist because consistently high salt intake is one of the most modifiable risk factors for high blood pressure (hypertension), which affects around one in three UK adults and significantly raises the risk of heart attack and stroke.

It's also worth knowing that salt and sodium are not the same thing. Some UK food labels list sodium rather than salt. To convert: multiply the sodium figure by 2.5 to get the salt equivalent. So 0.8g of sodium equals 2g of salt, a distinction that catches many people out when comparing products.

Where Is All That Salt Actually Coming From?

Most people picture the salt shaker when they think about cutting back. In reality, the majority of salt in the UK diet is already in food before it reaches your plate. Research from Action on Salt suggests around 75% of the salt we eat is added during manufacturing, not by us at the table or during cooking. The main culprits include:

• Bread and cereals, a staple that accumulates quietly across the day
• Processed meat products, bacon, sausages, cooked ham, and deli meats
• Ready meals and cook-in sauces
• Cheese
• Tinned and packet soups

None of these foods taste obviously salty in isolation, which is precisely why they're so easy to underestimate. A cheese sandwich, a bowl of soup, and a portion of pasta bake for tea can get you well past 6g without a single pinch of added salt.

UK Foods Surprisingly High in Salt

Some of the highest-salt foods in the average British shopping basket aren't the obvious crisps and salted nuts. These are worth knowing about:

• Bread, two slices of many standard supermarket loaves (Hovis, Kingsmill, Warburtons) can contain 0.9–1.1g of salt. Eat four or five slices across the day and you've spent a substantial portion of your daily allowance before you've considered any fillings.
• Ready meal pies and pasta bakes, a single supermarket cottage pie or lasagne from own-brand ranges typically contains 1.5–2.0g of salt per serving.
• Stock cubes and gravy granules, a single Oxo cube contains around 2g of salt. Bisto Original granules are similarly high. Because these are used in small quantities, they're easily overlooked, but the salt concentrates directly into your dish.
• Tinned soup, a standard 400g can of Heinz cream of tomato or chicken soup can contain 2.0–2.5g of salt. Lower-salt alternatives exist but aren't always prominently labelled, so check the back of the tin.
• Smoked salmon, often regarded as a healthy choice, a 100g portion can exceed 3g of salt due to the curing process.
• Soy sauce, a single tablespoon of regular soy sauce contains roughly 1.5–2g of salt. Reduced-sodium versions from brands like Kikkoman or Pearl River Bridge cut this by around 40% and are widely available in UK supermarkets.

How Excess Salt Affects Your Health

The strongest and most consistent evidence links a high-salt diet to raised blood pressure. When blood pressure stays elevated over time, it places chronic strain on the heart, arteries, kidneys, and brain. The NHS notes that cutting salt intake across the UK population could prevent a significant number of strokes and heart attacks each year, it's one of the most impactful dietary changes most people can make.

High salt intake has also been associated with an increased risk of stomach cancer in some epidemiological studies, and may worsen conditions such as kidney stones and osteoporosis by affecting how the body handles calcium and waste excretion. That said, it's worth keeping proportion in mind: salt isn't inherently dangerous, and your body does require some sodium to function. The concern is sustained overconsumption over years, not the occasional salty meal.

How to Read UK Food Labels for Salt

Most UK packaged food uses a colour-coded traffic-light system on the front of pack. For salt:

• Red (high): more than 1.5g of salt per 100g
• Amber (medium): 0.3g–1.5g per 100g
• Green (low): 0.3g or less per 100g

The per-100g figure is useful for comparing products, but the per-portion figure is often more relevant in practice, a food may show amber per 100g yet the stated portion is large, pushing your actual intake into red territory. Always check both columns. And if you see sodium listed rather than salt, multiply by 2.5.

Easy Ways to Reduce Salt Without Sacrificing Flavour

You don't need to overhaul your diet overnight. Small, consistent changes are easier to sustain, and your palate adapts faster than most people expect. Research suggests taste preferences for salt recalibrate within roughly three to four weeks of consistently eating less of it, meaning lower-salt food stops tasting bland.

• Switch your stock, Kallo low-salt stock cubes and Marigold Swiss Vegetable Bouillon (reduced salt) are available in most supermarkets and make a noticeable difference to soups and stews with very little flavour compromise.
• Compare bread labels, brands vary considerably. Sourdough from an independent bakery is often lower in salt than mass-produced sliced loaves. Even within the same brand, seeded or wholegrain variants can be lower than white.
• Rinse tinned foods, draining and rinsing canned pulses, sweetcorn, and tuna under cold water removes a measurable amount of added salt from the brine or water they're packed in.
• Lean on flavour alternatives, fresh garlic, lemon juice, fresh and dried herbs, black pepper, and ground spices add real depth without sodium. A squeeze of lemon over fish, chicken, or roasted vegetables often does the job of a pinch of salt entirely.
• Buy reduced-salt versions of everyday staples, Heinz offers a reduced-salt and sugar baked beans variant; Tesco, Sainsbury's, and ASDA all stock own-brand lower-sodium soy sauces, stocks, and soups. The flavour difference is minimal in cooked dishes.
• Cook more from scratch, batch-cooking chilli, soups, and curries at home puts you in complete control of sodium. Ready meals are the single category where most people can make the largest reduction with the least effort elsewhere.

Frequently Asked Questions