Green and purple tomato ketchups have similar levels of the health promoting antioxidant lycopene to their popular red counterpart, claim researchers, who also identified that dark red ketchup boasts the strongest levels. Testing 13 commercial ketchup sources – organic and different coloured varieties – scientists at the US department of agriculture revealed that the organic versions excelled, with one brand containing 183 micrograms of lycopene per gram of ketchup, about five times as much per weight as a tomato, reports the New Scientist.
