Throughout history, humans have evolved from an active nomadic lifestyle to a sedentary lifestyle. However, this is a different type of sedentary lifestyle than currently seen. As people increasingly enter the technological world, the active lifestyle slowly fades into the distant past. For example, automobiles have replaced the need to walk to or from destinations. Another fact is that people no longer have to expend energy foraging for food or growing their own food. All they have to do is open the refrigerator and choose what they would like to consume. As a consequence of the sedentary lifestyle and the consumption of more and more carbohydrates, stored in the body's fatty tissues, the body no longer needs to expend more energy, carrying out only the essential functions to keep the person alive. This is because there are no extraordinary circumstances, such as agriculture or hunting, that push the body to consume more energy, which leads to an increase in obesity and consequently to the emergence of many health-related problems, the biggest of which is diabetes. . The growing importance of diabetes in society is of utmost concern, in order for medical professionals to treat patients they must know the symptoms, diagnosis and effects of diet and insulin in the body. Diabetes mellitus, or diabetes, is a metabolic disease with two distinct types: Type 1 and Type 2. The first type of diabetes results from the inability of the pancreas to secrete insulin which results from the destruction of pancreatic beta cells. The destruction of these beta cells is of concern because they are the cells that produce insulin, a hormone that maintains normal blood glucose levels. Symptoms such as polyuria (excessive amount of urine... half the paper... during meals (ADA, 2015). The second is represented by biguanides, which lower blood glucose levels by decreasing the amount of glucose produced by the liver. Metformin is a type of biguanides that are taken twice a day; the only side effect is diarrhea which can be prevented if taken with food (ADA, 2015). types of meglitinides, repaglinide and nateglide, which are taken before each meal (ADA, 2015). glucose production in the liver. There are two common types of thiazolidinediones used today, Rosiglitazone and Pioglitazone, which are carefully monitored for liver problems and if they appear increase the chances of heart failure (ADA)., 2015).