Our team investigates the relationship between diet and type 2 diabetes (T2DM) prevalence, focusing on the impact of plant food consumption on fasting blood sugar levels. Conducted at a Health Promoting Hospital in Thailand, with 61 T2DM cases and 74 age/gender-matched controls, it employed a validated food frequency questionnaire to assess dietary intake. Significant differences were observed in fasting blood sugar levels among T2DM patients based on specific plant food consumption. Adherence to a plant-based diet correlated with improved glycemic control, particularly with a higher intake of certain vegetables and fruits. Diabetic patients consumed more legumes, and increased consumption of nuts/seeds was associated with a 76.3% reduction in T2DM diagnosis risk. These findings underscore the potential of dietary modifications in managing T2DM, necessitating further research into metabolic disorder prevention and treatment strategies.