Health: Second Opinion

Dr Tony Smith
Saturday 04 June 1994 23:02 BST
Comments

Your support helps us to tell the story

From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.

At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.

Your support makes all the difference.

ONE of the pleasures of old age ought to be that there is no longer much point in self- denial to improve health. The older someone is the less benefit can be expected from such measures as a low-fat diet. And though smoking is an unhealthy habit at all ages, there seems little point in nagging an 80- year-old grandfather puffing away at his pipe when, at worst, he is reducing his life expectation of six years to maybe four - figures which are, furthermore, no more than informed guesses by actuaries.

Detailed data to support this viewpoint have emerged from an analysis of the past 25 years' research on cholesterol. A review in the British Medical Journal of 41 research studies showed that a diet that lowers the blood cholesterol by 10 per cent will have little or no effect on the risk of a heart attack for two years or so, but that after five years the reduction in risk becomes substantial.

The benefits to health are, however, crucially dependent on age. Someone aged 35 who sticks with a cholesterol-lowering diet for five years cuts his or her risk of having a heart attack by 50 per cent. At the age of 50 the decrease in risk is 40 per cent. It is 30 per cent at the of 60 and only 20 per cent at the age of 70-75. Beyond that, who knows? Very little research has been done on really old people.

The message is plain: the earlier in adult life the diet is modified to lower cholesterol (by cutting down on the intake of dairy and animal fats) the greater the benefits.

Might a cholesterol-lowering diet do the elderly any harm? Sceptics who have questioned the whole campaign to change the foods we eat have drawn attention to the fact that people with very low blood cholesterol have increased death rates from cancer - and suicide. Recent careful analysis of the data has shown, however, that it is usually the disease that lowers the cholesterol not the low cholesterol that causes the disease.

Further, studies of men with jobs show no link between low cholesterol and cancer; the association is confined to studies of whole populations which include the unemployed and people in poor health. Several types of cancer have now been shown to lower the cholesterol level, often before they cause any symptoms. People with depression, too, have low cholesterol levels and this is the explanation for the link with suicide.

So if the elderly are likely to derive neither much benefit nor any harm from a low fat diet, are there any ways in which they can improve their health? That depends on how good their health is already. Without doubt, stopping smoking will help people with coronary heart disease, poor circulation in their legs, stomach ulcers and a good many other conditions. Losing weight will help the breathless and people with arthritic hips and knees. People who have become dependent on alcohol or tranquillisers will need specialist help to wean them off. But we should remember that research on the elderly has mostly been on the sick elderly. Those fit men and women who come from families in which everyone lives to be 90 have, presumably, bred out any faulty genes for heart disease, stroke or dementia and doctors are ill advised to give such healthy people any advice, no matter how well intentioned.-

Join our commenting forum

Join thought-provoking conversations, follow other Independent readers and see their replies

Comments

Thank you for registering

Please refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in