د.عمر عبدالسلام عقيل2026-07-062026-07-06https://dspace.academy.edu.ly/handle/123456789/2428. Ketones are produced, and are found in large quantities in ketosis, the liver converts fat into fatty acids and ketone bodies, which can be used by the body for energy (Botion et al., 1999). In addition, excess fatty acids in serum of diabetics are converted into phospholipids and cholesterol in liver. These two substances along with excess triglycerides formed at the same time in liver may be secreted into blood in the form of lipoproteins (Jaworski et al., 2007).Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia resulting from defects in insulin secretion, insulin action or both. Two major forms of diabetes were identified; type 1 and type 2. Lack of or severe reduction in insulin secretion due to autoimmune destructions of β cells is responsible for type 1 diabetes, which accounts for 5-10% of diabetic patients. The more prevalent form type 2 diabetes, accounts for more than 90% of cases (Olefsky et al., 2001). Type 2 diabetes usually begins as insulin resistance, a disorder in which the cells do not use insulin properly.Lipid Profile and Oxidative Stress in Obese and Lean Libyan