im speaking on behalf of my family, but you can eat birria as a breakfast item but depending on the type of birria! the type we eat is very light and not greasy

don't take the fat soluble vits in high quantities ( vit D E A & K ) your body store them in fat They can be toxic to your body

while the water soluble ones, your body will get rid of them if they don't need them (can't be stored in high quantities: which are Vit C and B)