Hello I am 21 years old.(1,80m). Since I am a 80:10:10er I had never felt better in my life. But I have a problem I eat 2500 ckal per day and lose weight ! I love running but I am afraid to lose more weight and stopp it for the moment ! My weight dropped from 65kg to 60kg. I think this is not enough for a men. BMI = 19 ! Greetings from Germany.