However, in the months where the sun doesn't make many appearances we need to get Vitamin D from our diet - in oily fish and egg yolks - or through supplementation. (vitalise.ie)
First of all, we need good quality animal protein from meat, poultry, fish and egg yolks. (westonaprice.org)
The only animal protein I was eating was from fish and eggs. (rachlmansfield.com)