Oil is essential for our body to function. But that does not mean that we should take for granted the cooking mediums we use in our food. As the Centre for Science and Environment (CSE) laboratory report recently discovered our branded edible oils are full of unhealthy trans fats. The results showed trans fats in seven leading vanaspati brands were five to 12 times the 2 per cent standard set by Denmark. Trans fats are formed during the process of addition of hydrogen atoms to oils, a process industry prefers as it keeps the oil from turning rancid and ensures a longer shelf life.