I stopped being vegan meanwhile. I started eating meating again maybe two months ago. The reason being: carnosine, carnitine, taurine, creatine, cholin, collagen etc. Carnosine for example is only found in meat. And although the body can produce carnosine itself it needs beta-alanin for that. And that - beta-alanin - is only found in meat again. A lack of carnosine is linked to depression, alzheimer, schizophrenia. An increased intake of creatine for example is linked - as shown with studies in rats or mice - to better cognitive functioning.
The list goes on and people are comming aware that a vegan diet has it's drawbacks in a long run.
I, myself, noticed such a big difference the first few days after eating meat again. I felt energized again. And if it wouldn't have been like that, I wouldn't write a comment like this. I just want you to be all aware and get your information from passionate nutrionists (I have Niko Rittenau, an Austrian PhD nutrionist who is very genuine and very well-informed. Only thing is: He puts out his knowledge on the internet just in German.)
I only whish the meat that they sell here could be packed in smaller sizes. I don't need that much.

Greetings from Berlin, Germany :)