Families making tomato-based lunches
If you cook pasta, beans or vegetables for a secondary-school packed lunch, the tin is one ingredient you can compare by its salt label. The finished recipe depends on what else you add.
Who is this for?
Families comparing salt labels
For children aged 11 and over, a per-100g figure lets you compare tins of different sizes on the same basis. NHS inform states a daily maximum of 6g salt for this age group; the tomato tin alone does not describe the whole day's intake.
Households cooking several meals at once
If you use more than one tin across the week, compare the declared salt per 100g as well as the pack size. Check how you will store any tomatoes left after opening.
What should you compare?
Start with salt per 100g, then choose a texture and pack size that fit the recipe and how often you cook it.
| Priority | What to check | Your needs |
|---|---|---|
| Salt in the tin | Compare the nutrition panels per 100g, not one tin's serving with another tin's per-100g value. The NHS low-salt label threshold is 0.3g salt or less per 100g; it does not, by itself, establish a 'reduced salt' claim. | I want to compare tins on the same basis before deciding how much tomato to use in a lunch recipe. |
| Other ingredients | Check the salt declarations for additions such as cheese, cured meat, stock and prepared sauces. Consider the quantities used in the finished dish, not just the tomato base. | A lower-salt tin matters to me, but I also need to look at everything going into the meal. |
| Texture and pack size | Choose chopped or finely chopped tomatoes to suit the sauce you are making. Check the number and size of tins against how often you cook and how much you use at once. | For a chunkier sauce, I may prefer Napolina's chopped tomatoes; for repeated cooking, I need a pack size I can use. |
| Opened-tin storage | Read the exact product's instructions for transferring, refrigerating and using leftovers. ASDA Groceries specifies use within 3 days for JUST ESSENTIALS chopped tomatoes; Tesco's Napolina 4-pack listing specifies 2 days. | If one tin makes more than one meal, I need a plan for the remainder before opening it. |
| School arrangements | Check your school's packed-lunch policy before planning a recurring meal. England's Requirements for School Food Regulations 2014 concern food and drink provided to pupils in maintained schools and pupil referral units; they are not a substitute for checking a school's packed-lunch arrangements. | I want the prepared lunch to fit my child's school arrangements as well as the recipe. |
Common mistakes to avoid
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Assuming Italian or branded tomatoes contain less salt
Origin and branding do not tell you the salt figure. ASDA Groceries lists 0.01g per 100g for its two chopped-tomato options, Sainsbury's lists 0.07g for its Italian chopped tomatoes, and Napolina lists 0.10g for its chopped tomatoes.
Use the per-100g nutrition panel to compare the particular tins you are considering.
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Comparing different serving sizes
A half-can figure and a per-100g figure describe different quantities, so comparing them directly can change the apparent result. UK nutrition labels provide a per-100g basis, as explained by NHS and GOV.UK guidance.
Compare salt per 100g first, then account for the amount your recipe uses.
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Counting only the tomatoes
The tin's nutrition panel does not include the cheese, stock, sauces or other ingredients added to the finished lunch.
Check the labels and quantities of those additions when planning the whole recipe.
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Forgetting the opened-tin instructions
Storage periods differ by product. ASDA Groceries instructs shoppers to use opened JUST ESSENTIALS chopped tomatoes within 3 days; Tesco's Napolina 4-pack listing says within 2 days.
Transfer leftovers to a suitable non-metallic container, cover and refrigerate them, and follow the label on the tin you bought.
If a recipe uses only part of a tin, plan another use within that product's stated period.
Brand and product-line references
These figures describe the specified products, not every tin sold under each brand; compare the label on the pack you choose.
ASDA
ASDA Groceries declares 0.01g salt per 100g for both ASDA Chopped Tomatoes 400g and JUST ESSENTIALS by ASDA Chopped Tomatoes 400g.
- The two listed products give the same declared salt figure for a like-for-like per-100g comparison.
- Check the current pack label when choosing between the standard and JUST ESSENTIALS lines.
Sainsbury's
Sainsbury's lists its Italian Chopped Tomatoes as a 4 × 400g multipack with 0.07g salt per 100g.
- The multipack format may suit repeated cooking when that quantity fits household use.
- Its listed salt figure is higher than the 0.01g per 100g declared for the two specified ASDA tins.
Napolina
Napolina describes its chopped tomatoes as chunky and suitable for thick sauces; its product page declares 0.10g salt per 100g.
- The described texture gives sauce makers a reason to consider this product beyond the salt figure.
- The declared salt figure is higher than those for the specified ASDA and Sainsbury's products; check the exact pack when buying.
Mutti
Mutti describes Polpa as finely chopped tomato pulp with added salt. Its manufacturer page declares 0.30g salt per 100g.
- The finely chopped format may suit a recipe calling for a smoother tomato base.
- The manufacturer-listed figure sits at the NHS low-salt threshold, rather than below it. Check the nutrition panel on the particular pack.
Napolina options on Joybuy
These chopped-tomato listings offer different pack sizes for cooked lunch recipes. Their presence here does not replace a per-100g label comparison with other tins.
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Napolina Chopped Tomatoes 4 × 400g
For a cooked lunch recipe where a chunky tomato sauce suits the dish. Napolina lists 0.10g salt per 100g for its chopped tomatoes; Tesco's 4-pack listing says to transfer opened contents to a non-metallic container, refrigerate and use within 2 days.
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Napolina Chopped Tomatoes 6 × 400g
The listed six-tin format is worth considering if several cooked lunches are planned. Compare this pack's salt per 100g with other tins, and check its opening and storage instructions before planning to use any leftovers.
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Napolina Chopped Tomatoes, listed as 24 × 400g
For batch cooking, confirm the pack contents before ordering: the listed 24 × 400g quantity conflicts with the description's approximately twelve 200g portions. Check this pack's salt per 100g and storage instructions too.
Questions about packed-lunch recipes
What counts as low salt on a tinned-tomato label?
NHS guidance uses 0.3g salt or less per 100g as the low-salt label threshold. Read the declared per-100g figure to compare tins of different sizes; the threshold does not tell you the salt content of the finished lunch.
Does 'Italian' or 'plain' mean a tin is reduced in salt?
No: those descriptions do not establish a reduced-salt claim. Compare the nutrition panels instead. ASDA Groceries lists 0.01g salt per 100g for two specified chopped-tomato tins, Sainsbury's lists 0.07g for its Italian chopped tomatoes, and Napolina lists 0.10g for its chopped tomatoes.
Can I keep an opened tin for another lunch recipe?
Follow the instructions for the exact product and plan to use it within its stated period. ASDA Groceries says to transfer opened JUST ESSENTIALS chopped tomatoes to a suitable non-metallic container, cover, refrigerate and use within 3 days; Tesco's Napolina 4-pack listing says to use opened contents within 2 days.
Do England's School Food Standards decide what goes in a parent-packed lunch?
The Requirements for School Food Regulations 2014 concern food and drink provided to pupils in maintained schools and pupil referral units in England. For a lunch provided by a parent, check the individual school's packed-lunch policy; do not assume the English regulations describe arrangements elsewhere in the UK.