From another post..
The active ingredient in Total Lean is caffeine , with a 2 tablet dosage providing the same amount of caffeine that is contained in 2 or 3 cups of coffee. The other ingredients (black tea extract, grape skin extract, ginger root extract, grape seed extract, and dill weed extract) have not been proven to assist in weight loss in any manner. These are just the latest "miracle" products that are included in this and other weight loss supplements based on some very unclinical observations. Some of these items ARE antioxidants and can be helpful in the treatment or prevention of heart disease and cancer. Unfortunatley, the Total Lean label doesn't tell us how much of these antioxidants are in each serving, so they may not contain enough to benefit a bird. Also, since these products are unregulated, they may contain any amount of any of these ingredients, from a miniscule fraction of one thing, to dangerously high levels of another. They may also contain contaminants.
The Total Lean plan includes a 1500 calorie diet plan which is low fat and high fiber. If you follow this diet plan, you will lose weight. The pills have nothing to do with it. The plan is available on their site for free.