It has long been known that tomatoes possess many health benefits. Whether you eat them raw in salads and sandwiches, or cooked and processed into soups, purees, pastes and sauces, the good news just keeps on coming.

We’ve heard about their effect in preventing various types of cancer, of prostate and the skin, and the humble fruit’s use against heart disease and stroke. Now it’s a great cosmetic too.

The benefits are credited to lycopene, the pigment behind the distinctive red skin and a powerful antioxidant.

Professor Birch-Machin, of Newcastle University believes tomatoes are a cheap and simple way of improving health and looking good.

After a joint study by Manchester and Newcastle universities, he said, “I went into the study as a sceptic, but I was quite surprised with the significance of the findings.”

The British Society for Investigative Dermatology’s annual conference was told that tests using ultra-violet lamps showed that tomato-eaters were a third better protected against sunburn at the end of the study than at the start. Other tests suggested a tomato-based diet boosted production of collagen, the protein that keeps skin supple.

Tomatoes also protect the mitochondria, the parts of cells that turn food we eat into energy. “Being kind to our mitochondria is likely to contribute to improved skin health, which in turn may have an anti-ageing effect,” Professor Birch-Machin said.

The researchers now recommend two tomato-based meals a day for optimum health.

Many older people are put onto a low salt diet because of chronic or acute medical conditions, like high blood pressure and kidney disease.

Others choose low salt regimes to improve mental function which is responsive to salt intake. It’s known that in normal circumstances of climate and activity people need only half a gram of salt a day, way below the official guidelines of 6 - 7 grams.

If you ask them which foods they miss most, they will likely say “cheese”. Its particular flavor and texture can be quite addictive.

However, cheese is very high in salt.

There are exceptions. Some soft versions, like cream cheeses — usually not proprietary brands — can be salt-free. The problem is they don’t really taste or feel like cheese at all.

One solution is Swiss Emmental which is low in salt, but tastes very much like cheese. The Tesco brand contains only 0.2 grams per 30-gram typical serving. Others may vary, so check the labeling.

Bear in mind also that a value for sodium needs to be multiplied by 2.5 to get the full salt content.

Cheese needn’t be a no-go area for low salt dieters.