Gluten

Wheat, rye, oats, and barley are a major source of the protien gluten.
Research has shown that a disease called gluten intolerance can be
found in up to 35% of people without many of them knowing it (celiac
disease is the severe form of this disease).

Gluten intolerance is like a generally accepted and ignored disease, that creeps into and destroys many people's lives. The problem with gluten is that many people cannot digest it properly, and when it goes undigested into the ileum, it
causes serious inflamations that take time to heal.

The inflamations can hamper ingestion to any level you can think of which can cause severe deficiencies in vitamin B12, calcium, potassium, and other minerals and vitamins, and if prolonged can cause anaemia. Most of the people think that bread makes them fat only because of its large calory content, but actually more than one third of the fat people are fat because of gluten intolerance, because of the reduced metablism caused by vitamin B12 deficiency. Gluten intolerance can also make you lose weight very rapidly and in an unhealthy way, and can make you
vulnerable to all kinds of disease.