A recent study has revealed that some of the UK’s best-selling shop-bought sandwiches contain alarmingly high salt levels, with one variety having nearly five times the salt found in a McDonald’s cheeseburger. Action on Salt & Sugar analyzed 546 sandwiches, wraps, rolls, and baguettes from supermarkets and high street chains. The results showed that one in ten sandwiches surpasses recommended salt and calorie health limits.
Almost 44% of the sandwiches examined would carry a red “high” salt warning on their packaging, while 32% contain half or more of an adult’s maximum daily salt allowance in just one serving. The findings highlight the hidden salt in everyday lunch choices and expose the ineffectiveness of the Government’s voluntary measures to improve food nutrition.
The most concerning product identified was Gail’s Smoked Chicken Caesar Club sandwich. It contains an astonishing 6.88g of salt—equivalent to nearly 10 rashers of bacon or five McDonald’s cheeseburgers. Considering adults should consume no more than 6g of salt daily, this sandwich alone exceeds the limit. It also packs 1,067 calories and reaches 90% of an adult’s daily saturated fat limit, while providing only 20% of the recommended daily fiber intake.
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The overall picture is worrying: one-third of sandwiches would earn a red warning for saturated fat, and over one in seven are simultaneously high in fat, saturated fat, and salt. Additionally, 97% of sandwiches fall short of providing even a third of the daily fiber requirement. One-quarter of the sandwiches are labeled “less healthy” under the Nutrient Profiling Model, limiting their promotional opportunities.
Sandwiches purchased out-of-home generally had higher salt content than supermarket options. Among the saltiest were Gail’s Smoked Salmon Bagel with Schmear and Pickled Pink Onions (4.2g salt) and Paul’s Rosette Cheese Salami Gherkin (4.19g salt). Pret A Manger’s Ham & Greve Baguette contained 3.85g, while Tesco’s Fully Loaded Hot Honey Halloumi, Falafel and Pickled Slaw had 3.78g of salt. Tootoomoo’s Sriracha Pork Sando and Sainsbury’s Kitchen Deli Pastrami sandwich each contained 3.67g of salt—more than 12 standard bags of ready salted crisps.
However, salt content varied significantly between similar sandwiches. Pret A Manger’s Chicken Salad Sandwich had 2.22g salt, whereas Greggs’ Roast Chicken Salad Sandwich had just 1.1g. Likewise, M&S’s All Day Breakfast Sandwich contained 2.65g salt, compared to 1.54g in Sainsbury’s version. These examples demonstrate that salt reduction is both achievable and practical. Lower-salt options, such as Subway’s Veggie Delite Sub (0.60g salt) and Pret A Manger’s Avo, Olive & Toms Half Baguette (0.82g), show that healthier alternatives already exist.
Certain companies like Pollen + Grace, The Gym Kitchen, and Urban Rajah consistently met calorie and salt targets, avoided red warning labels, and had no high fat, sugar, or salt products. Among retailers, Asda and Lidl fully complied with salt targets for sandwiches, while Starbucks and Greggs had the lowest average salt levels in the out-of-home sector.
Current data suggests UK adults consume an average of 8.4g of salt daily—40% above recommended limits—with much of it hidden in processed and ready-to-eat foods like sandwiches. Excess salt intake is linked to high blood pressure, a major cause of stroke, heart disease, and kidney problems. With consumers purchasing 11.5 billion sandwiches yearly across the UK, this is a pressing public health issue.
Sonia Pombo, head of research and impact at Action on Salt & Sugar, emphasized the urgency for regulatory action: “People pick sandwiches for convenience and affordability, but many unknowingly consume a full day’s salt allowance in a single meal. More than 20 years after salt reduction targets were introduced, it is unacceptable that some companies still sell products exceeding daily limits. Voluntary measures have failed, and the Government must implement mandatory policies to protect public health.”