I lose on 1700-1800 cals/day 1-2 lbs/week (with some days going as high as 2400 cals and even yet had a 3700 cal day

), am basically sedentery except for the 4 days a week that I run 5.4 miles (total of 21 miles/week), and am 44 yrs old.
I think if your protein is good, it DOES sound like your calories may be too low and therefore you may be stressing your metabolism to slow down. Just yesterday I was talking to a a/c repairman who came to my house who was very much overweight. He told me the sad thing is that he really hardly ever eats! I believed him cuz I never ate so much when I was overweight as I do now...I eat every 2 hours now.
Hope this helps.
