Saturated fat advice 'unclear'

fat in a pan Animal products such as sausages and butter tend to be high in saturated fat

Related Stories

Swapping butter for a sunflower spread may not lower heart risk, say British Heart Foundation researchers.

Contrary to guidance, there is no evidence that changing the type of fat you eat from "bad" saturated to "healthier" polyunsaturated cuts heart risk.

They looked at data from 72 studies with more than 600,000 participants.

Heart experts stressed the findings did not mean it was fine to eat lots of cheese, pies and cakes.

Prof Jeremy Pearson, British Heart Foundation: "Our advice at the moment wouldn't change from what it was yesterday"

Too much saturated fat can increase the amount of cholesterol in the blood, which can increase the risk of developing coronary heart disease.

Saturated fat is the kind of fat found in butter, biscuits, fatty cuts of meat, sausages and bacon, and cheese and cream.

Most of us eat too much of it - men should eat no more than 30g a day and women no more than 20g a day.

There has been a big health drive to get more people eating unsaturated fats such as olive and sunflower oils and other non-animal fats - instead.

sunflower spread Polyunsaturated fats include sunflower spreads and plant oils such as olive oil

But research published in Annals of Internal Medicine, led by investigators at the University of Cambridge, found no evidence to support this.

Total saturated fat, whether measured in the diet or in the bloodstream as a biomarker, was not associated with coronary disease risk in the 72 observational studies.

Fat facts

  • Butter, lard, ghee, palm oil and coconut oil are all high in saturated fat
  • All of us need some fat in our diet for good health
  • Eating too much fat can raise cholesterol, which increases heart risk
  • A high fat diet can also make you overweight, which is another risk factor for heart disease

And polyunsaturated fat intake did not offer any heart protection.

Trans fats were strongly and positively associated with risk of heart diseases. These artificial fats, found in many processed food items and margarine spreads, should continue to be regulated and avoided, say the study authors.

Lead researcher Dr Rajiv Chowdhury said: "These are interesting results that potentially stimulate new lines of scientific inquiry and encourage careful reappraisal of our current nutritional guidelines."

He added that the common practice of replacing saturated fats in our diet with excess carbohydrates (such as white bread, white rice, potatoes etc), or with refined sugar and salts in processed foods should be discouraged.

Start Quote

The findings are certainly not an invitation to gorge on a diet of cream cakes and fatty meat pies”

End Quote

"Refined carbohydrates, sugar and salt are all potentially harmful for vascular health," he said.

The British Heart Foundation said the findings did not change the advice that eating too much fat is harmful for the heart.

Prof Jeremy Pearson, the charity's associate medical director, said: "This research is not saying that you can eat as much fat as you like.

"Too much fat is bad for you.

"But, sadly, this analysis suggests there isn't enough evidence to say that a diet rich in polyunsaturated fats but low in saturated fats reduces the risk of cardiovascular disease.

"Alongside taking any necessary medication, the best way to stay heart healthy is to stop smoking, stay active, and ensure our whole diet is healthy - and this means considering not only the fats in our diet but also our intake of salt, sugar and fruit and vegetables."

More on This Story

Related Stories

The BBC is not responsible for the content of external Internet sites

More Health stories

RSS

Features & Analysis

BBC Future

(Mike Keeling/Flickr/CC BY-ND 2.0)

The bug we’re programmed to fear

Why are we so revolted by roaches? Read more...

Programmes

  • Bitcoin logoClick Watch

    The developer behind the new Bitcoin tech on the fears it will hide criminal activity

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.