K2 seems to stick out to me as one vitamin that would be hard to get, but I'm not sure if it does anything for mental health. It's mostly in animal products (th

K2 seems to stick out to me as one vitamin that would be hard to get, but I'm not sure if it does anything for mental health. It's mostly in animal products (though can be made by bacteria or something which I think is how they make the supplements). If I recall correctly, B12 is potentially problematic too.