What's the Problem with Grains?

Grains are in fact a large supply of starch, surrounded by a kernel.

Starch decomposes (digests) into maltose and isomaltose in the
intestines, which then decompose into glucose. You can look at it this
way. When you take a slice of bread and crush it in your hand, you are
virtually eating that amount of refined sugar. The problem is that that
amount of sugar elevates the bloodsugar levels amazingly fast and
causes your pancreas to produce lots and lots of insulin to metabolise
it. Humans are not adapted to eat such amounts of concentrated
carbohydrates and the pancreas (and adrenals) aren't fit to the job.
Over time one will develop insulin resistance, hypoglycemia, diabetes
II. Another problem is that the immune system crashes when your
bloodsugar levels increases to high levels. It takes *hours* for the
the immune system to recover fully.

Another problem with refined grains is that it's void of minerals and
vitamins, which are needed to properly digest and metabolise the huge
amount of starch. So, each time you eat a slice of bread, your body
needs to take minerals and vitamins from its limited stores to digest
and metabolise it. Over time, you will develop deficincies of these
vitamines and minerals.