Personally I ate nothing but processed, microwaveable meals for 3 years during university. I find it hard to believe that this significantly affected my perform

Personally I ate nothing but processed, microwaveable meals for 3 years during university. I find it hard to believe that this significantly affected my performance since I still managed to get the best result in my year (twice) and second best (once). I also failed to get fat or develop any health problems at all. So you can colour me sceptical about the true value of eating "healthy" or freshly-cooked food.