I didn't notice any difference. But then I always make sure to eat properly, and I love fatty foods. And I tend not to totally waste myself. To quote from Håvamål, the ever-fascinating old Norse poem about etiquette, proper conduct, etc:
A better burden may no man bear
For wanderings wide than wisdom;
Worse food for the journey he brings not afield
Than an over-drinking of ale.
I no longer post here after VB was sold in 2012. (See my profile page for details.)