I can confirm that in my personal experience the change in my diet has brought benefit on a multitude of aspects of normal life.
I have drastically reduced my meat consumption, I am not a vegetarian, but I limit myself to eating only totally natural meat starting from breeding to slaughtering with no added preservative additives.
Already this has completely changed my sleep quality and I feel more rested in the morning.
After all, it's true, we are what we eat!