The UK Tuna Buying Guide: Avoiding Common Pantry Staple Pitfalls

From quick lunchtime sandwiches to protein-packed salads and comforting pasta bakes, tuna is a cornerstone of the British pantry. It’s convenient, versatile and a fantastic source of protein. Yet, navigating the supermarket aisle (or a webpage) can be surprisingly complex. Not all tuna is created equal, and a few common pitfalls can mean you’re not getting the quality or value you expect.

As a Joybuy Product Recommendation Officer, my role is to help you see past the marketing clutter. Before you add that next can or pack to your basket, let’s look at the frequent traps that catch out even savvy shoppers.

• The "Steak" vs. "Chunk" Ambiguity: You might pay a premium for tuna steak, expecting a solid, meaty fillet, only to find it’s little different from the cheaper tuna chunks. The distinction can be blurry, and the texture you get might not match the price you paid.
• The Packing Liquid Calorie Trap: Choosing between tuna in sunflower oil, tuna in spring water or tuna in brine isn't just a matter of taste. The liquid significantly impacts the nutritional profile. A can of tuna in oil can contain more than double the calories of one in water, a detail often overlooked by those seeking a lean protein source.
• The Drained Weight Deception: The net weight on the can includes the liquid. The figure that truly matters for value and protein content is the drained weight—the actual amount of fish you're getting. Some products may seem like a bargain until you realise a large portion of the weight is just water or oil.

Decoding the Label: 3 Factors to Check Before You Buy Tuna

To make sure you’re choosing the right product for your needs, focus on these three core parameters. They will tell you everything you need to know about the flavour, texture and value of the tuna inside the can.

1. The Cut: Steak, Chunks or Flakes?

The form of the tuna dictates its texture and its ideal culinary use.

• Tuna Steak: This is typically a single, solid piece of loin. It offers the firmest, meatiest texture, making it excellent for salads where you want distinct pieces of fish, or for lightly searing if you buy frozen tuna steak.
• Tuna Chunks: These are smaller, broken pieces of tuna loin. This is the most versatile and common type, perfect for tuna mayonnaise, pasta bakes and general salads. The quality can vary, but good canned tuna chunks should be firm, not mushy.
• Tuna Flakes: These are much smaller, shredded pieces, often pre-mashed. They are designed for maximum convenience in sandwiches and dips where a smooth, easily spreadable texture is desired.

2. The Packing Medium: Oil, Water or Brine?

The liquid your tuna is packed in affects its flavour, moisture and nutritional content.

• Tuna in Sunflower Oil: The oil is absorbed by the fish, resulting in a richer flavour and a moister, more tender texture. This is a popular choice for sandwiches and salads where you want that extra richness. However, it significantly increases the fat and calorie content.
• Tuna in Spring Water: This option preserves the natural, clean flavour of the tuna. It is the leanest choice, with the lowest calorie and fat content, making it ideal for health-conscious consumers looking for a high protein tuna source.
• Tuna in Brine: A salt-water solution, brine sits between oil and spring water. It adds a subtle savoury flavour and helps keep the fish moist without adding fat. It contains more sodium than tuna in spring water, which is a consideration for some diets.

3. The Format: Single Cans, Multipacks or Frozen

How you buy your tuna can impact both convenience and cost-effectiveness.

• Single Cans: Ideal for trying a new brand or for occasional use.
• Tuna Multipack: Offers better value for money and is perfect for families or anyone who uses tuna regularly. It ensures your pantry is always stocked for quick meals.
• Frozen Tuna: Options like frozen tuna steak or whole fish offer superior texture and flavour for cooking, especially for dishes like seared tuna or homemade sushi. Sashimi grade tuna is specifically prepared to be safe for raw consumption.

Top Product Recommendations

Based on these practical considerations, here are a few options from our catalogue, matched to different needs and lifestyles.

MATCH FOR: The Health-Focused Meal Planner

Morrisons Fad Free Tuna Chunks In Spring Water 145g (6 Packs)

Why This Fits Their Persona: This multipack is ideal for those who plan their meals and prioritise high-protein, low-fat ingredients. The spring water base keeps calories to a minimum, making it perfect for post-workout meals, lean salads and healthy lunches throughout the week.

How It Avoids the Trap

It directly avoids the packing liquid calorie trap by using spring water. The 6-pack format also addresses the value issue, providing a cost-effective supply and clear information on drained weight per can.

Key Advantage & Pros

Very high in protein (24.9g per 100g drained) and low in fat (1.0g). The multipack format offers convenience and good value for regular consumption.

MATCH FOR: The Adventurous Home Cook

Super Frozen Tuna Steaks - Sashimi Grade - 2 Steaks - 260g

Why This Fits Their Persona: For those who want to go beyond the can, these frozen steaks offer superior quality for more ambitious dishes. The sashimi-grade certification means they are suitable for slicing raw for sushi or poke bowls or for searing to perfection, leaving the inside rare.

How It Avoids the Trap

This product sidesteps the canned "steak vs. chunk" debate entirely by offering a genuine, solid tuna steak. Its specific grading ("sashimi grade") provides clear assurance of its quality and intended use, removing any ambiguity.

Key Advantage & Pros

Premium quality suitable for both raw and cooked preparations. The two individually portioned steaks reduce food waste and make meal prep straightforward.

MATCH FOR: The Busy Family Shopper

Princes Tuna Chunks in Sunflower Oil 4 Pack 4 x 145g

Why This Fits Their Persona: This multipack is a reliable workhorse for family meals. The tuna chunks in sunflower oil are a classic choice for flavourful tuna mayo sandwiches, jacket potato toppings and creamy pasta bakes that appeal to all ages. The 4-pack ensures there's always a quick meal solution on hand.

How It Avoids the Trap

This is an upfront, no-nonsense product. It's clearly labelled as "chunks in sunflower oil," so you know you're getting a moist, flavourful product, not a lean one. The multipack format provides excellent value, avoiding the higher per-can cost of single purchases.

Key Advantage & Pros

A versatile and flavourful option for a wide range of family-friendly recipes. The multipack offers great value and pantry-stocking convenience.

Frequently Asked Questions

Q1: What is the real difference between tuna chunks and tuna steak in a can?

In theory, a tuna steak should be a single, solid piece of tuna loin, offering a firm, meaty texture. Tuna chunks are smaller pieces broken from the loin. In practice, the quality can vary by brand. A high-quality can of chunks can sometimes be firmer than a low-quality steak. The key is to find a brand that consistently delivers the texture you prefer for your intended dish.

Q2: Is tuna in oil, water, or brine healthier?

For the lowest calorie and fat intake, tuna in spring water is the clear winner. It allows you to get the full protein benefit without added fats. Tuna in brine is also a low-fat option, but it contains more sodium. Tuna in sunflower oil has the highest calorie and fat content, but the fats are primarily unsaturated. The "healthiest" choice depends on your overall dietary goals.

Q3: How long does canned tuna last once opened?

Once you open a can of tuna, you should transfer any leftovers into a non-metallic, airtight container. Store it in the refrigerator and consume it within two days for the best quality and safety. Never store leftover tuna in the opened can.