How Much Salt Should I Eat a Day?

Salt is necessary. Sodium regulates fluid balance, nerve signalling and muscle function, and a genuine deficiency is dangerous. The problem is not that people eat salt but that almost everyone eats several times what the body needs.

The recommendation

UK guidance is a maximum of 6 grams of salt a day for adults, which is about one level teaspoon. The World Health Organization recommends 5 grams.

Average UK intake sits above the 6 gram figure, and has come down over two decades of reformulation work without reaching the target.

The body’s actual requirement is far lower, in the region of 1 to 2 grams a day for most people.

Where it actually comes from

This is the part that changes behaviour, because the intuitive answer is wrong.

Around three quarters of salt intake comes from processed and prepared food. Only a small share is added at the table or during home cooking.

The largest contributors are:

• Bread. Not especially salty per slice, but eaten in quantity, which makes it one of the biggest single sources.
• Processed meats. Bacon, ham, sausages and salami are among the saltiest everyday foods.
• Cheese. Particularly hard and blue varieties.
• Ready meals, sauces and soups. Often containing a substantial fraction of the daily limit in one portion.
• Crisps, savoury snacks and salted nuts.
• Takeaways and restaurant meals, where a single main course can exceed the entire daily limit.

Removing the salt cellar from the table is a reasonable habit and addresses a small part of the problem.

Reading the label

Labels give salt per 100 grams and usually per portion. The traffic light thresholds per 100 grams are:

• Low, green: 0.3 g or less
• Medium, amber: between 0.3 g and 1.5 g
• High, red: more than 1.5 g

Two cautions. The per-100-gram figure is for comparison between products, not for what you will eat, so check the portion size too. And the stated portion is frequently smaller than what people actually serve.

If a label gives sodium rather than salt, multiply by 2.5 to get the salt figure.

Why it matters

Sodium causes the body to retain water, increasing blood volume and therefore the pressure in the arteries. Sustained high blood pressure is a major risk factor for stroke, heart attack, heart failure and kidney disease.

The relationship between salt reduction and blood pressure is one of the better-established findings in nutrition. Trials consistently show measurable falls within weeks of reducing intake, with the largest effects in people whose blood pressure is already raised and in older adults.

The population effect is what drives the guidance. A small average reduction across a whole country prevents a substantial number of strokes and heart attacks, even though any individual might notice nothing.

Sea salt, rock salt and the rest

All of them are sodium chloride. The trace minerals in sea salt and pink Himalayan salt are present in amounts far too small to have any nutritional effect, and the body responds to the sodium identically.

The one genuine difference is crystal size. Flaky sea salt has larger crystals, so a teaspoon of it contains less sodium than a teaspoon of fine table salt, and it delivers more perceived saltiness per gram because it dissolves on the tongue. Used deliberately as a finishing salt, that can mean slightly less sodium for the same taste.

That is a marginal effect, and it does not make any salt a health food.

Cutting it down

Taste adapts. Salt preference is learned, and it recalibrates over roughly two to four weeks. Food that tastes bland at first stops tasting bland, and previously normal food starts tasting too salty. This is the single most encouraging fact about reducing salt.

Reduce gradually rather than all at once, for the same reason.

Cook more from scratch, which is the largest lever available given where the salt actually comes from.

Use acid and aromatics. Lemon juice, vinegar, garlic, herbs, pepper, chilli and toasted spices all increase perceived flavour without sodium.

Compare brands. Salt content varies severalfold between similar products, particularly bread, sauces and baked beans. Switching brand is free and requires no change in habit.

Rinse tinned pulses and vegetables, which removes a meaningful share of the salt in the liquid.

Watch the obvious offenders rather than everything. Soy sauce, stock cubes, olives, cured meat and table sauces are concentrated sources where small reductions add up quickly.

Who should be stricter

People with high blood pressure, heart failure, kidney disease or diabetes are often advised to go below the general limit, and should follow the specific advice they are given.

Children need considerably less, scaled by age, and the taste preferences formed in childhood persist, which is why the guidance for them is both lower and more emphatic.

What happens when a country reduces salt

The UK ran one of the more successful salt reduction programmes anywhere, working with manufacturers to lower salt gradually across hundreds of product categories.

The reductions were deliberately small and incremental, on the basis that taste adapts and nobody notices a two percent change. Average intake fell measurably over the programme’s most active years, alongside falls in average blood pressure and in deaths from stroke and heart disease.

That is the strongest practical argument for the gradual approach at an individual level too. A sudden cut is noticed and resisted. A slow one is not noticed at all, and the palate arrives somewhere different within a couple of months.