North Korean leader Kim Jong Un has regained weight and is suffering from obesity-related health problems including high blood pressure and diabetes, and his officials are looking for new medicines abroad to treat them, South Korea’s spy agency told lawmakers on Monday.

The 40-year-old Kim, known for heavy drinking and smoking, comes from a family with a history of heart problems. Both his father and grandfather, who ruled North Korea before his 2011 inheritance of power, died of heart issues.