Skimpflation in the Pantry: How Supermarkets Are Quietly Replacing Nutritious Mackerel with a Cheaper Alternative

When Quality Gets Cut for Cost

It's easy to overlook the small changes in our grocery aisles. But when a staple like tinned mackerel is quietly replaced with a less nutritious alternative, it raises deeper questions about what we're really paying for—and what we're getting.

"It's a real concern when manufacturers quietly downgrade everyday staples like these as shoppers can end up paying the same price for a product that delivers significantly less nutritional quality," said Sue Davies from Which?.

This is not just about taste or texture—it's about value, and how we, as consumers, understand what we're buying. The switch from Atlantic mackerel to jack mackerel is part of a wider trend that has been dubbed "skimpflation"—a term coined to describe how companies are subtly reducing the quality of products to save money.

The Mackerel Crisis

Atlantic mackerel, once a common fixture in British supermarkets, is rapidly disappearing from shelves. The reason? Overfishing has decimated its population. In fact, the International Council for the Exploration of the Sea (ICES) estimates that Atlantic mackerel stocks have dropped by roughly three-quarters over the past decade.

According to the Marine Stewardship Council (MSC), North East Atlantic mackerel catches have exceeded scientifically advised limits by an average of 39% over the last 15 years. The MSC has even revoked its certification for Atlantic mackerel, making it harder for retailers to source it under sustainability standards.

A New Label, a New Choice

Princes, one of the UK's largest fish suppliers, made headlines last October by switching all its tinned mackerel to jack mackerel—a different species entirely. This move was driven by two factors: overfishing and cost. Jack mackerel is not only more sustainable but also about one-third the price of Atlantic mackerel.

Despite its name, jack mackerel isn't a true mackerel. It belongs to the Carangidae family, while traditional mackerel is part of the Scombridae family. The label change, which was only approved by UK authorities in late 2025, has been met with concern from consumer groups who worry about the lack of transparency.

• Jack mackerel contains about half as much omega-3 as Atlantic mackerel
• It has around a third less vitamin B12
• The texture and taste are different, prompting complaints from consumers

Supermarkets Are Responding to Supply Chain Challenges

But it's not just Princes. Lidl is selling jack mackerel under its own brand, while Waitrose announced last year that it would suspend the sale of fresh mackerel due to overfishing concerns. Even supermarkets in countries like the Netherlands and Sweden are making similar moves.

This is a symptom of a broader issue in global seafood supply chains. As fish stocks shrink, companies are forced to find alternatives—often at the expense of nutrition and consumer expectations. It's an unfortunate reality that comes with our demand for affordable seafood year-round.

Skimpflation: A Growing Trend

The term "skimpflation" captures how businesses are quietly altering products to reduce costs without informing consumers. The practice has been on the rise across industries, from food and beverages to household goods. It's a form of economic pressure that often goes unnoticed until it hits your shopping cart.

Sue Davies from Which? puts it bluntly: "While manufacturers face genuine supply chain pressures and sustainability challenges, they have a responsibility to shoppers to be completely upfront when they change a product's recipe."

Consumer Awareness and the Cost of Transparency

The real issue isn't just about cost or sustainability—it's about trust. When supermarkets quietly swap ingredients or alter recipes, they risk undermining the confidence that consumers place in their brands.

We need better labeling and more open communication from manufacturers. Consumers have a right to know what they're buying, especially when it comes to food products that are part of our daily nutrition. And as we continue to face environmental challenges, we must also demand responsible business practices that don't come at the expense of our health or our wallets.

Looking Ahead: What's Next for Mackerel?

The future of mackerel is uncertain. As scientific warnings grow louder and consumer awareness increases, it's likely that more retailers will have to reconsider their sourcing strategies. The pressure from organizations like the Marine Conservation Society, as well as public demand, will force change—though not necessarily quickly.

In the meantime, consumers should stay informed about what they're purchasing. If you're unsure about a product's ingredients or sourcing, don't hesitate to ask. After all, a truly sustainable and responsible food system starts with transparency—and an informed consumer base.