Farmers have grown a novel form of carrots that are 40 per cent richer in antioxidants and can boost vision compared to normal varieties.

The super-food, which is set to hit the market next week, is 40pct rich in beta-carotene, an antioxidant the body converts into vitamin A and boosts health.

It has been found to improve vision in dim light, strengthen body’s immunity to infections such as winter colds and flu, and helps maintain healthy skin.

The new Super A carrots that are intensely orange with a sweet taste were developed by growers in Shropshire.

“Eating Super A carrots is the ideal way to boost your intake of beta-carotene which as well as converting to vitamin A is also an antioxidant.” Antioxidants help protect body cells from damage,” the Daily Express quoted M&S nutritionist Claire Hughes.

Dr Elisabeth Weichselbaum, of the British Nutrition Foundation, said a lack of vitamin A could lead to eye problems and even night blindness.

However, researchers have warned that consuming huge quantities would not improve night vision beyond its natural limit.