let me know if that link didn't work [it should, i'm fairly certain it's public] that's a weight loss aid i was given many years ago. i've used it and many of my pagan friends have as well. it won't make you drop the weight without effort, but it will help with cravings and motivation. use it to help you form new habits it should be what you're looking for.
of course if you're trying to start a new healthy lifestyle you might also consider speaking with a dietitian and a personal trainer to determine the best plan for you. not a 'diet' but a new eating regiment [like various salads you don't need to drench in dressing] as well as a fun work-out routine you'll enjoy [say zumba or hot yoga] if you're using this as a 'i'm gonna drop ten pounds and go back to my cheeseburgers and couch surfing' then no, i doubt any spell will help. only long term change will bring long term results. best of luck to you.