provides a small peas of the puzzle. you can t change your blood type but can change your life-style. jon: i asked jenna a little while ago. she said she doesn t know her blood type. a lot of people don t. most people don t. i didn t know my blood type until i delivered my blood first sown seven years ago. or give you o-negative which is the universal donor. if you want to find out the blood type i recommend everyone donate blood. go to the local red cross. save a life and find out your blood type. jon: i found out first time i gave blood. ab negative. i m according to this study greatest risk. 23% higher risk for heart disease. you want to make sure you re eating healthy. fresh fruits and vegetables whole grains and getting fish and omegas and exercising every day. don t smoke. if you do stop smoking. talk to your doctor so they can follow you closely. jon: jenna is watching my