The Food Hospital, a weekly television programme on Britain’s Channel 4 has conducted an experiment to find if blueberries enhance brain function.

Volunteers were workers in a small advertising sales business who need to stay alert all day to maximise sales. The doctors provided one smoothie to each worker at 10am every working day for two weeks.

During the first week they were given a banana drink, the second week a handful of blueberries in a smoothie.

The results were decisive. During the banana week, the team showed a small improvement in function in the mornings, but a significant drop off in the afternoons.

In the blueberry week, there was a marked improvement in the mornings and, contrary to the banana results, a continued superiority in the afternoons.

There is no question that the blue antioxidant, anthocyanin, in the blueberries did improve both brain efficiency and longevity of functioning.

Novelist Fay Weldon’s famous advertising slogan for eggs back in the last century is being revised again.

Despite worries about cholestrol, nutritionists are now saying that eggs are one of the most nutrient-dense foods and are suggesting we need one a day for optimum health.

The study, which has been released today and will be published in June in the science journal Nutrition and Food Science, analyzed 71 research papers and documents about eggs.

Eggs are low in calories and a rich source of protein. They contain nutrients essential to good health, like vitamin D, vitamin B12, selenium and choline. They have the richest mix of essential amino acids of any other food.

Antioxidants in eggs could help prevent age-related macular degeneration, a leading cause of blindness, especially in the elderly.

Dietician, Dr Carrie Ruxton, said: “The health benefits of eggs would appear to be so great that it’s perhaps no exaggeration to call them a superfood — they are one of the most nutrient-dense foods available. Eggs are not only low in calories but are packed with nutrients that are essential to healthy living. They are an ideal food at every stage of life, as well as being easy to cook and enjoyable to eat.”

Eggs are an important dietary source of vitamin D. One egg provides more than 20 percent of the recommended daily allowance. Low levels of the vitamin have been linked with medical conditions, including poor bone health, cancer, heart disease, multiple sclerosis, immune disorders and mental health problems.

Dr Ruxton said, “There are clear nutritional benefits to eating eggs on a regular basis. Emerging evidence suggests that eggs may be beneficial for satiety, weight control and eye health. With previous limits on egg consumption lifted, most people would benefit from a return to the days of going to work on an egg.”

The work was funded by the British Egg Industry Council.

If you spend a lot of time on a computer, you will soon notice a problem — apart from brain fatigue in late afternoon — and that’s eye strain.

So how bad is eye strain for those of us who work on screens most of the day? Do we take the health of our eyes for granted? Are we uncomplaining martyrs to eye strain until something even more painful and debilitating turns up, usually out of the blue?

Are there strategies we can adopt to prevent it?

The main cause of computer users’ eye strain seems to be the result of constant close-focusing. When the eyes are looking at a distant object the muscles are relaxed and loose. When focused on something near they are contracted and tense. Over time, too much close work causes eye problems.

One of the simplest ways to counteract this tendency is by “palming visualization”, adapted from an exercise in the Bates Good Sight Without Glasses programme.

Palming is quite simple: when your eyes are strained, or preferably before, place the palms of your hands over your eyes so as to block out all light. Keep them there for a couple of minutes or so and you’ll find your eyes are quite refreshed.

Now, if you also visualize an object in the far distance, say, a tree, or a ship on the horizon, this will cause your eyes to focus into the distance thus unlocking the clenched effect of close viewing. This double exercise, repeated at 15 or 30-minute intervals depending on the severity of the problem, is very beneficial for eye strain.

It’s often said that dark green, leafy vegetables contain a substance, lutein, which prevents macular degeneration, particularly in older eyes. This is a common problem, apparently. So start digging up those cabbages.

Another tip for persisent problems with screen-induced eye strain is to buy a pair of magnifying glasses. These are just prescription-free reading specs with simple magnifying lenses, typically 2.5x. You can often pick them up in libraries, or even in gift shops these days.

There must be a lot of it about.

Broccoli is the latest vegetable being hailed as a “super food”, as scientists have announced it contains substantial amounts of the chemical sulforaphane, which helps the body keep the arteries clear so that a healthy flow of blood is maintained.

Although researchers have yet to prove whether simply eating larger amounts of broccoli is enough to make a difference, their findings add to the notion that fresh vegetables form an essential part of our daily diet if we are to maintain and improve our health, which is the principle behind the Government’s “Five a Day” campaign.

The research into the use of sulforaphane was funded by the British Heart Foundation, and it is hoped that it will lead to further breakthroughs in reducing or preventing heart disease.

Green vegetables, and in particular broccoli, have long been recognised for their health benefits. Being rich in antioxidants, they are beneficial for the skin and may even reduce the risk of certain cancers. The chlorophyll in green vegetables promotes healthy red blood cells, and nutritionists claim that eating greens can help maintain healthy blood pressure, prevent strokes and have a positive impact on the eyes and brain.

From an early age most people are trained to enjoy bland, processed food that is high in salt and sugar. When you look at the hundreds of ready meals on our supermarket shelves, it’s no wonder that people often complain that they can’t tolerate the natural flavours of certain fruit and vegetables. Often broccoli is criticised for being bitter tasting or too “strong” but we’re constantly bombarded with scientific support for the benefits of fruit and vegetables, so perhaps it’s time to re-train our palates and make some positive changes.

One approach is to change the proportion of meat and vegetables we have on our plates. Piling the plate with two thirds vegetables to one third meat is an easy principle to follow that will probably increase your intake of vegetables.

Taking care to present food attractively and to use a variety of cooking methods, including sometimes serving up raw vegetables, will maintain your family’s interest as well as avert boredom with what’s on the plate. Using vegetables to create a simple soup starter is also useful strategy, and you can hide less popular veggies easily in soups or sauces that are dominated by the delicious flavours of herbs and spices.

Planning and preparation are key in ditching convenience foods and eating a fresh, healthy diet. Freezing is not detrimental to the nutritional value of food, and therefore making and storing extra portions for use at busy times is a wise move that can help stop you reaching for the take-away menu or filling up on junk food.

See also Broccoli – the unloved superfood.

Rhian Gibbings