I've stolen this from agonycat and added a few of my own.

Top Twelve Reasons for Slow Weight Loss...

1) Age
2) Past dieting habits...do you yo-yo diet?
3) Exercise
4) Medical conditions you don't know about
5) Water intake
6) Cheating
7) Alcohol consumption
8) Metabolism
9) Low carb frankenfoods - low-carb foods that imitate high carb foods. Includes artificial sweeteners
10) Not eating enough calories - especially fats
11) Having a small percentage of weight to lose
12) Stress

Karen