Emotional benefits of a Vegan diet

I have been on a high protein diet for the past decade, but I would do a raw cleanse for 30 days about once a year.  

I remember during a few of my cleanse, just looking at myself, my being, and feeling as if I felt like a different person. 

I felt even, calm and peaceful.  

In contrast, I had always been a sensitive and emotional person, so this was a different experience.

About 60 days ago, I started a raw food cleanse, and after thirty days, I remained plant-based eating, just adding cooked meals to my practice.

I have been feeling even, calm and peaceful in the way that I remember from during my raw food cleanse periods.

I have so far found three different articles that talk about the findings that show that, in general, vegans have a higher level of emotional well-being.  There are far fewer depressions and anxiety amongst vegans.

I have not found scientific reasonings that stand out to me, other than one article pointing to Omega 6 in the meats that could be causing the emotional ups and downs.

My curiosity goes to the affect that slautering time may have on the animals.

While I am still looking for scientific reasons behind why I am feeling the calm I am, I can confidently say that I feel different in a profoundly positive way.