Flour – Are Whole Grain Flours Traditional? — Mrs Dulls Nourished Kitchen

Interesante post sobre la harina integral.
"Whole grain flours include germ which is the part of the grain containing oil. Before it’s ground mother nature has it’s own packaging to keep the germ fresh. Grinding into flour crushes this natural packaging releasing the oil. This nutritious germ oil in the flour goes rancid easily. To prevent this whole grain flours need to be refrigerated, frozen, or gas flushed and vacuum packed."
"Prior to the modern era most American towns and European villages had a gristmill. This mill was the source of flour for the village. Farmers brought in their grains and the flour was sold back in differing grades according to the grain type and coarseness. This flour was sifted (boulted) to the degree it could be with a simple sifter or cloth. This process would remove much of the bran. The flour was made on demand, not stored for long periods of time. It still contained much of the germ and would go rancid fairly quickly."

http://mrsdullsnourishedkitchen.com/choosing-flour-are-whole-grain-flours-traditional/