Whole grains contain 40 out of the 44 nutrients needed to sustain life. Once ground they start to oxidize and begin the spoilage process. Up to about 100 years ago, people would grind their flour at home or purchase from a local miller. They would use the whole flour in a short time span before it would go bad.
In 1878 commercial flour mills ...
Wheat and bread are biblical and God made it perfect for our health, unfortunately, because of the introduction of seed oils, chemicals and high processing of our food supply, American health has declined drastically.
In 1975 we bought an home ELECTRIC wheat grinder. My Mom was all for healthy foods. When they were kids in 1930's, they lived mainly from their gardens and local good wholesome foods.
Fastforward to 1975, I built a hopper and container to make our wholewheat flour. Organic wheat from a Trad farmer, of course! I would grind enough for 6 loaves batch. It just so happened that we never stored that flour...luckily.
About 4 years later I read that when you use these grinders the flour gets hot in the process. ..So it starts to get rancid, unless you freeze it. Rancid foods/oils are CARCINOGENIC!! Burnt oil is really scary too!
So thousands are using these grinders but are ignorant about the real dangers of storing the once overheated flour.
Cancer #2 killer, no wonder!!?
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https://eap.mcgill.ca/publications/EAP35.htmSTONE-GRINDING OF GRAIN
In the third century B.C., rotary grindstones powered by animals, * and small rotary hand mills called querns, replaced stone or wooden mortars and pestles for the grinding of grains. Querns are still used in rural areas of the Middle East, Far East, and parts of Africa (Hall, 1974).
There are several advantages to stone-ground wheat flour. The endosperm, bran, and germ remain in their natural, original proportions. Because the stones grind slowly, the wheat germ is not exposed to excessive temperatures.
Heat causes the fat from the germ portion to oxidize and become rancid and much of the vitamins to be destroyed (Aubert, 1989). Since only a small amount of grain is ground at once, the fat from the germ is well distributed which also minimizes spoilage (Mount, 1975). Nutritive losses due to oxygen exposure are also limited by the fact that stone-ground flour is usually coarser (Thomas, 1976). As expressed in The Bread Book (Leonard, 1990), stone-ground flour is preferred by many bakers and natural food advocates because of its texture, its sweet and nutty flavour, and the beliefs that it is nutritionally superior and has a better baking quality than steel-roller-milled flour. Moritz and Jones (1950) and Schultz et al. (1942) showed that stone-milled flour was relatively high in thiamin, compared to roller-milled flour, ..."
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* In the Old Testament blind Samson had to push the milling wheel as punishment, and he very strong. That flour was not overheated, of course.