Compare the salt figure per 100g on the exact tin before choosing by its packing medium or a diabetes-friendly description. NHS guidance defines low salt as 0.3g or less per 100g; the spring-water examples discussed here list 0.75g, 0.85g and 1.0g per 100g, so none meets that threshold. Check the current pack’s ingredients and salt per tin as well, particularly if you plan to eat the whole tin.
If reducing salt is your main reason for comparing tuna, look at the nutrition panel rather than the front-of-pack description. Diabetes UK notes that excess salt can raise blood pressure, a consideration for people managing diabetes.
Spring-water, brine and no-drain tins offer different ways to use tuna, but their names do not establish their salt levels. Compare the exact products you would buy.
A small or no-drain tin may suit a meal that uses tuna straight away. Check how much salt the amount you will eat contains, and read the pack’s instructions if you expect leftovers.
Start with salt per 100g on a comparable label basis, then check the ingredients and the amount of tuna you expect to use.
| Concern | What to check | Who this matters to |
|---|---|---|
| Salt on the exact tin | Compare salt per 100g on the same basis, including whether values refer to drained tuna. Then check salt per tin or intended portion. NHS guidance calls 0.3g or less per 100g low salt. | If reducing salt is my priority, I need figures I can compare even when tin sizes differ. About 50% of consumers put the comparable salt figure first. |
| Ingredients and packing medium | Read the ingredients for added salt, oil, sauces or flavourings; do not use “spring water” as a substitute for the nutrition panel. | For a simply flavoured base in a sandwich or meal, I want to know what comes with the tuna. About 30% of consumers prioritise the ingredients and packing medium. |
| Portion and pack format | Check the tin’s weight, its salt per tin where stated, and instructions for storing unused contents. | When one meal needs only a small amount, a convenient pack matters to me, but I still need to account for what I eat. About 20% of consumers put portion and pack format first. |
Those terms describe the product format, not its salt classification. Tesco Groceries lists John West No Drain Tuna Steak in spring water at 1.0g salt per 100g; NHS guidance defines low salt as 0.3g or less per 100g.
Compare salt per 100g for the exact variant, then check the amount in the tin or portion you intend to eat.
A per-tin figure and a per-100g figure describe different quantities, so placing them side by side can obscure the difference between products.
Use equivalent per-100g figures for the initial comparison. Use per-tin or portion information to assess the amount you would actually eat.
Diabetes UK says there is no single “diabetic” diet. A diabetes-friendly description alone therefore cannot tell you whether a particular tin fits your eating plan.
Read the current nutrition and ingredients labels, and consider the tuna alongside the rest of the meal.
Ingredients and nutrition information can change. Marks & Spencer advises shoppers to read the pack label for its Tuna Chunks in Spring Water.
Check the tin in hand before eating, especially when its salt content or allergen information matters to you.
Princes lists both spring-water chunks and sandwich tuna in brine, giving shoppers two named variants to examine rather than treating the packing medium as the answer.
The M&S Tuna Chunks in Spring Water listing provides ingredients and a per-100g nutrition panel for checking this particular product.
The John West No Drain Tuna Steak with a Little Spring Water offers a format that avoids draining, with nutrition figures shown for both 100g and its 60g can.
Tesco Groceries lists own-brand tinned tuna in spring water and brine alongside other product variants.
This spring-water tin is an option for shoppers who want to compare the exact product label before deciding whether its salt content suits their meal.
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This 160g spring-water tin may suit a meal where you want tuna without a brine-packed format. Check the current pack for salt per 100g, whether that figure refers to drained tuna, and salt in the amount you plan to eat; the packing medium alone does not establish that it is low salt.
No special tuna label is required. Diabetes UK says there is no single “diabetic” diet, so assess the tin’s ingredients, salt and portion in the context of your own eating plan and the rest of the meal.
Not necessarily. NHS guidance defines low salt as 0.3g or less per 100g. Marks & Spencer lists 0.75g per 100g for its Tuna Chunks in Spring Water, Princes lists 0.85g per 100g drained for its spring-water chunks, and Tesco Groceries lists 1.0g per 100g for John West No Drain Tuna Steak with spring water. None of those particular products meets the low-salt threshold.
Spring water is a useful starting point if you want that packing medium, but choose on the exact label rather than assuming it has less salt. Princes lists 0.85g salt per 100g drained for its spring-water chunks and 0.9g per 100g for its Sandwich Tuna in Brine; check comparable label bases when assessing other tins.
Check the salt per tin where it is stated, as well as the per-100g figure used to compare products. Tesco Groceries lists the John West No Drain 60g can at 0.6g salt per can, alongside 1.0g per 100g; those figures answer different questions.
Yes. Tuna is fish, so read the current pack’s allergen information if fish is a concern. If you will not use the whole tin, follow that product’s instructions for storing unused contents after opening.