Sweetener found in soft drinks, flavored water and concentrated drops to dilute are real enemies to people who wan't to lose weigh. Natural sweetener or synthetic are substances which has a large sweetening power. So, a small quantity gves a lot of flavors. Since quantities are infinitesimal, these molecules haves the advantage of not giving calories. All sugar taste, without calories! This is the secret of these substances. So why should we ban these products if we wan't to lose weigh? With observation studies, we see that people which eat these kind of foods haves "rage" of "cravings" insatiable for sweet foods. Unable to resist, they eat sweet foods in too much large quantity. They end by taking more weigh instead of losing it.

Why is the temptation more present with consumer of "false sugar"? Because soft drinks with "zero calories" offers sugar taste wihtout producing it's effect in the body.

True sugar, when eaten, raise glucose and favorise secretion of insulin. Insulin allows sugar in bady cells. This hormone has another function, to favorise entry of amino acids inside tissue. But the tryptophan, an amino acid, which resist to this effect. So when eating sweet food, blood becames more concentrated with tryptophan. Therefore, a larger quantity of tryptophan will get to the brain. When it gets there, tryptophan favorise productions of serotonin, a neurtransmitter which has a known effect of "calming". So, when foods taste like sugar without having sugars, they don't produce this calming effect that leads to pleasure of eating. It's how we became insatiables, since we always try to satisfy fully this need.