The book "Vitamin Deficiencies and Glucose Tolerance in Urban South Indian" authored by R. Jayashri explores the prevalence of vitamin B12 and vitamin D deficiency and their association with folic acid and homocysteine among urban South Indians with different degrees of glucose tolerance. The book provides an extensive analysis of the prevalence of vitamin B12 and vitamin D deficiency among urban South Indians, as well as their association with folic acid and homocysteine. The author discusses the various factors that contribute to vitamin deficiencies, including dietary patterns and lifestyle choices, and highlights the need for early detection and intervention to prevent long-term health consequences. The book also explores the relationship between vitamin deficiencies and glucose tolerance. The author discusses the impact of vitamin deficiencies on insulin resistance, which can lead to the development of type 2 diabetes. The book presents the results of various studies conducted on the association between vitamin deficiencies and glucose tolerance, providing valuable insights for clinicians and researchers. Overall, "Vitamin Deficiencies and Glucose Tolerance in Urban South Indian" is a comprehensive resource for clinicians, researchers, and students interested in the field of nutrition and metabolic disorders. It provides a detailed analysis of the prevalence of vitamin deficiencies and their impact on glucose tolerance among urban South Indians, highlighting the importance of early detection and intervention to prevent long-term health consequences.