Our expert says:
Dear Miss P
They work in different ways - the drops and pills and potions usually contain pseudo-epinephrine or synephrine which is an appetite suppressant. This works for awhile and then requires large doses to achieve the same effect, thus these products can be addictive and they also have endless negative side-effects. Other programmes use liquid meal replacements like shakes, etc, to make the use cut down drastically on food intake - hence the weight loss. ALL these products and regimens also make people use a very-low-energy diet and it is usually the diet that makes them lose weight, not the pills and potions, so it is just as useful and much more sensible and cost effective to just use an energy-reduced diet and exercise to lose the weight. Such an approach costs much less both in monetary and health terms.
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