Green Tea

I've read that green tea burns fat, suppresses appetite and increases metabolism. I don't know if that's true or not but it can't hurt to drink a cup or so every day along side reducing calorie intake and increasing exercise.

Multivitamins

I take a multivitamin every day and two calcium tablets.

The multivit is to make up for any deficiencies in my diet, although when I stick to a weight-loss diet I think I probably have more vitamins and minerals from all the fruit and vegetables compared to when I'm eating badly and gaining weight.

The calcium is because I've seen a number of articles which say calcium is important for metabolising fat, and people who eat a lot of low-fat dairy whilst on a weight-loss diet lose more weight than people who take in the same number of calories without the dairy. Not all the diets I follow include much dairy (the Cabbage Soup Diet is a good example) so I make sure I always take a calcium supplement instead.