Should you be worried that food isn’t as good for you as it used to be?
THIS month marks the 250th anniversary of the death of William Stark, a brave dietary pioneer. A young English doctor, he wanted to show colleagues how important it is to eat a rich and varied diet – by restricting his own. First, he ate nothing but bread, water and sugar for a month.
Not surprisingly, he felt terrible. Then he added in foods such as roast goose and boiled beef, before moving on to eating nothing but honey pudding and Cheshire cheese.
In February 1770, at the age of 29, he died of scurvy – a horrible, now rare disease caused by severe vitamin C deficiency.
Scurvy killed more than two million sailors between the late 15th and mid-19th Centuries – and was responsible for more deaths than all other diseases combined. Early symptoms are intense lethargy, muscle weakness and aching joints. Later, the body swells and the skin and soft tissues – such as the gums – break down.
Old wounds open, and ultimately it causes fatal, catastrophic internal bleeding. There are accounts such as those of William Stark throughout history linking scurvy to diet, and in particular fresh produce: vegetables and citrus fruits were observed to help fight the condition.
But it wasn’t until the 1930s that scientists finally isolated vitamin C – or rather, a severe lack of it – as the cause.
GIRLS AND BOYS NEED CALCIUM, WOMEN NEED EXTRA IRON
THESE days, scurvy is fairly unusual. Better knowledge of nutrition and easy access to fresh fruit and veg are key factors. It’s also pretty easy to treat with vitamin C supplements. So you’d be pretty unlucky to die of it in Britain today. In fact, across the board, vitamin deficiencies are rare. But, interestingly, it’s minerals that, according to scientific data, that many of us aren’t getting enough of today. The indicator that our diets are lacking comes from The National Diet And Nutrition Survey carried out in the UK.
The most recent data uncovered some startling statistics. One in teenage boys and almost one in five teenage girls weren’t consuming enough calcium, found mainly in dairy produce and essential for bone health. More worryingly, 48 per cent of teenage girls, and 27 per cent of adult women (under the age of 65) had low iron intake.
Without iron, found in red meat, fish and, in smaller amounts, in vegetables, we are vulnerable to anaemia – where there are not enough red blood cells to carry oxygen around the body, leading to fatigue and other problems.
And perhaps the most worrying finding is that young women are chronically short of iodine, a mineral we get mainly from cow’s milk. If a woman is low in iodine while pregnant this can reduce her child’s IQ. So what’s going on? Some blame these nutritional deficiencies on the way our food is produced. There are articles, available online, that make sugten gestions such as ‘in the 1950s, oranges were full of vitamin A, but today you’d have to eat 21 of them to get the same amount’. I can find no scientific data to back this up. But in 2004, American researchers looked at the nutritional content of a range of fruits and vegetables, comparing modern crops with those grown in the 1950s. They concluded that over the years there had been falls in some nutrients, including calcium, phosphorus, iron and vitamin C. Why? This was said to be the result of breeding new varieties of fast-growing crops. Lead scientist Dr Donald Davis, of the University of Texas, explained: ‘Crops that grow bigger and faster don’t have the ability to make or take up nutrients at the same, faster rate.’
Has the same happened here? It’s not known. A recent UK Government report found levels of the mineral selenium in the British diet had fallen dramatically over the past 30 years – not because of soil depletion but due to a change in how we manufacture food.
SO SHOULD WE ALL BE TAKING SUPPLEMENTS?
I am not a fan of popping pills, but there are instances where supplements will help.
If you are pre-menopausal, and feel tired and run down, get your iron levels checked, as iron deficiency anaemia is very common. If you are anaemic, you will probably need a daily supplement.
It’s also widely recommended to take a daily supplement of vitamin D during winter, while taking zinc lozenges is proven to reduce the impact of the common cold.
Despite my concerns, reports about modern fruit and veg being ‘empty shells’ are exaggerated – they remain an excellent source of most vitamins... and minerals. n