I started a thread about this topic the day before yesterday, if you go onto my profile and latest started threads you will find it. The most common one was Psyllium Husks which you can order online or go to a health food shop. They were £12 for 200 and you take 2 capsules 3 x a day an hour before a meal.
I also read this on a website about boosting metabolism.
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Psyllium[/h]This is the herb often used in weight loss pills and products. Take a teaspoonful of psyllium mixed well with a glass of juice or water before each meal. Psyllium husk helps the body to get rid of fats by cleansing your colon, rather than storing them as extra weight. Having regular bowel movements raises your metabolism. Because of its high fiber content, psyllium also helps you feel fuller fast so you eat less.