Please don't lose heart hun. Xen is an assistant, but it is you who can and will lose the weight. This is a great time to prepare for the time you take xen. As you will know, you need to make changes to your diet, and get your head round a few new 'rules' for your food. Getting this all sorted before you get the xen is a great opportuity. You will minimise the chances of side effects in the futute, and you will likely lose weight without the xen. As we have to eat such a low fat diet on xen, most of the weight you lose is through changing your diet and exercise habits. When you eat little fat, there is not much for the xen to block. Some people plan to use slimfast like you, but alot of us have also been able to find yummy recipies that are within the rules. Could you use this time to get used to the rules and try some of the recipies? You will benefit in the meantime, and xen supplies are starting to return. Use that frustration to burn some calories trying a little exercise. Best of luck and keep us posted on your progress x