The number of diabetic patients will increase three times by 2025, according to the Diabetes Endocrine Nutrition Management and Research Centre (DENMARC), which is a group of doctors working on the reduction of the disease for the last two decades. DENMARC director H.B Chandalia, while announcing 'Defeat Diabetes' here today, said the number of diabetic patients was on the increase due to change in lifestyle and diet in the country. DENMARC has organised a three-day event, 'Defeat Diabetes 2008', at the Nehru centre starting from May 23 to 25, which will be inaugurated by Nita Ambani.