How Carbohydrate metabolized?
Carbohydrate is broken down in stomach and glucose is separated in the intestine and from there it is realized in to the blood stream. Thus blood sugar level increases in the blood stream, once blood sugar level increases immediatly pancreas senses it and releases insulin with respect the level of sugar in blood. Thus insulin level too increases in the blood stream, which is the key to unlock the body cell to consume glucose for its energy. The excess of glucose after consumption by the body cells is stored in the liver by converting glucose into glucogen.

If in-fasting (that is no food consumed) then there will be shortage of glucose in blood. Low glucose level means low level of insulin in blood, on seeing this liver convert stored glucogen into glucose and realized into the blood stream to maintain blood glucose level and helps to supply nutrient for entire body.

Insulin hormone
The above said all conversions are controlled by insulin secreted by the pancreas. Insulin is a hormone and it is the controlling or commenting signal that controls carbohydrate metabolism and helps to maintain normal blood glucose level in blood.

Body cells start consuming glucose only when there is certain level of insulin in blood. If the insulin level is very high means high level of sugar that is not consumed, then liver convert this excess glucose in to glycogen and store it.

Diabetes Mellitus
Any defect in the carbohydrate metabolism causes an increase in blood glucose level in the blood called as diabetes. Diabetes is caused by shortage of insulin secretion or no insulin secretion or in-effective utilization of insulin (insulin resistance).

Diabetes sign and symptoms
Body system tries to normalize high level of glucose in blood by different means causing some unusual symptoms called as diabetes symptoms.

Some of the most common diabetes symptoms are:

Frequent urination – Frequent urination does not means two or three time urination than normal, but it means doubled or tripled urination than normal. Frequent or too much thirsty – Frequent thirst means even after drinking enough water, there will be thirst with very short time. Sudden weight loss or gain – Sudden weight loss or gain will be noted within few day, may be within a month. Blurred vision – Even after a good night sleep, there is a blurred vision and difficult to concentrate. Heavy hunger – Immediately after a heavy meal there is a feeling of hunger. Increased fatigue – Even if having the meals in time and have rest as usual, there is a feeling of tired and fatigue. Poor wound healing – If having hurt which heals very slowly than normal. Irritability – Mentally feel tired and irritable.

If have many of these diabetes symptoms, then it is advisable to have a blood test to measure glucose level in blood. And if proved positive then it is must to maintain the blood glucose level near normal, because long term of badly maintained blood glucose level may lead to many diabetes complications such as; nerve damage, eye damage, kidney problems, heart attack, brain stroke, depression and amputation.