The term "diabetes" or "to pass through" was first used in 230 BCE by the Greek Apollonius of Memphis. The disease was considered rare during the time of the Roman empire, with Galen commenting he had only seen two cases during his career. This is possibly due to the diet and lifestyle of the ancients, or because the clinical symptoms were observed during the advanced stage of the disease. Galen named the disease "diarrhea of the urine" (diarrhea urinosa).
In type 2 diabetes the body has an increasingly harder time to handle all the sugar in the blood. Large amounts of the blood sugar-lowering hormone insulin are produced, but it’s still not enough, as insulin sensitivity decreases. At the time of being diagnosed with type 2 diabetes, diabetics usually have ten times more insulin in their bodies than normal. As a side effect, this insulin stores fat and causes weight gain, something that has often been in progress for many years before the disease was diagnosed.