Milk containing Omega 3 fatty acids derived from oily fish is to go on sale this week.
It is produced by cows which are given a special fish oil blend along with their normal feed.
A 250 ml serving contains ten times more of the Omega 3 acids known as DHA and EPA than regular milk.
Around 1,000 cows on farms in the south and west of England have been fed the new human-grade blend of fish oils, a spokesman for suppliers Milk Direct said.
"It certainly doesn't taste any different to normal milk," he added.
Omega 3 fatty acids tackle heart disease and ensure healthy nails, hair and skin.
Claire Williamson, nutrition scientist at the British Nutrition Foundation, said many people in the UK did not eat the recommended one portion per week of oily fish.
" The main reason we encourage people to consume oily fish is because it is linked to a decreased risk of heart disease," she said.
"A healthy, balanced diet is always the best approach and I would always encourage people to eat oily fish. But if people don't like it we have to look at alternatives."
M& S spokesman Paul Willgoss said: "There are various ways people can get Omega 3 into their diet - through supplements or products with added Omega 3 - but this is the first milk that has them naturally included --hence why we've termed it 'Super Milk'."
According to the Food Standards Agency, Omega 3 fatty acids are found in certain vegetable oils but these may not have the same benefits as those in fish.
The 'Fresh Omega 3' whole and skimmed milk will go on sale at Marks and Spencer stores this week.
Meanwhile, fears that drinking milk could lead to a higher risk of heart disease and stroke could be misplaced, suggests the results of a major 20-year diet study of men in South Wales.