irradiation of food

The EU does not consider the irradiation of food to pose any health concerns yet this process kills all goodness in such foods and its long term uses is still very unproven to say the least.
Three weeks ago I bought a bag of mixed salad from a main chain retailer I forgot about it in the green draw of my fridge till yesterday ,when i saw it again yesterday for the first time it looked the same as the day I bought it

Surely food that don't rot can not be good for our bodies your thoughts here and also if you have had similar surprizes with other foods.