Advanced glycation end products (AGEs) are formed by the Maillard reaction, a nonenzymatic process that occurs widely in cooking, food processing, and within the human body. Primarily, AGEs are formed by the glycation of reducing sugars with amino groups, and this process is heat-dependent. With changes in lifestyle, there has been an increase in the diversity of dietary habits, including those patterns associated with Western diets, which include the consumption of processed foods that are rich in AGEs. Excessive intake and exposure to AGEs are known to cause abnormalities in body function such as obesity, diabetes, and fatty liver, and the beneficial effects of AGEs in food processing in improving food flavor and quality. To obtain meaningful data regarding AGEs in a variety of food and human samples, it is necessary to more precisely characterize and analyze the AGEs extracted from samples to obtain accurate results. This review explores the recent analytical research and characterization of AGEs in foods, including casein, β-lactoglobulin, soy protein, and meat protein, and in human samples, such as glycated-albumin, hemoglobin, and plasma. Additionally, it explores the metabolic fate of AGEs in the body and the mechanisms of disease associated with metabolic abnormalities that may be caused by the consumption of foods containing AGEs. This review aims to provide an overview of the perspectives of relevant recent and future research on metabolic abnormalities caused by foods containing AGEs or by AGEs produced in the body.