This book; with blood lipid levelsas the subject explores the relationships between B.M.I (body mass index)Abdominal (central) obesite Life style Cigarette smoking (active and passive) Eating habits Gender Age Snore OSAS (Obstructive Sleep Apne Syndrom)contains an original work.In this study especially in terms of the effects of passive smoking exposure for an additional importance of blood HDL level. The book is also published doctoral thesis (SCI)includes summaries of articles. Some of the articles ; . Pass?ve c?garette smoking of ?t''s effect on HDL cholesterol elevat?on. . Effect of cigarette smoking on high density cholesterol . Body mass index central obesity relationship between blood lipid levels and snoring. . Effect of cigarette smoking and obesity on blood levels lipid