Families are being told to cut their consumption of red meat and sugar by half to improve their health and help save the planet.
Scientists say the adoption of a ‘planetary health diet’ is vital to feed the world’s booming population without destroying the environment.
The radical plan would mean people eating just 7g of pork a day, 7g of beef or lamb and 28g of fish – the equivalent of a quarter of a rasher of bacon, a 16th of a burger and two-thirds of a fish finger.
Experts say this would prevent around 11million early deaths by 2050 by slashing obesity, heart disease and type 2 diabetes.
But critics dismissed the campaign being launched today as ‘nanny-state madness’.
The report was drawn up by 37 experts from 16 countries in a three-year project.
Its authors stress that the world population is expected to reach ten billion by 2050, and Earth has finite resources for food production.
They say a billion people are already malnourished, and another two billion are eating too many of the wrong foods.
Previous studies have shown meat uses 83 per cent of the world’s farmland while providing only 18 per cent of calories.
The diet, details of which were published in the Lancet medical journal, would mean a radical shift away from meat and dairy to vegetables, beans, nuts