This is an interesting follow-up question on post #83: Diet Sodas and Metabolic Risks: “I have heard that the intense sweet flavor of artificial sweeteners signals the body that there are a lot of carbohydrates coming. Since the diet soft drink provides none, a craving for them may be stimulated - hence the weight gain associated with sodas, diet or not. Have you heard this explanation before?”
Indeed, I have. I’ve seen a couple of studies suggesting that artificial sweeteners encourage the taste for sweet. I think these are preliminary and need further confirmation but the idea is consistent with trends. As I explain in the chapter on diet drinks in What to Eat, rates of overweight have risen in parallel with the increase in use of artificial sweeteners, so on a population basis, the chemicals don’t seem to do any good for weight trends. Individuals may find them helpful to control calorie intake, but on average most people seem to compensate–and overcompensate–for calorie savings from artificial sweeteners. After all, a teaspoon of sugar is only 16 calories and it doesn’t take much to compensate. When it comes to food, I don’t like anything artificial and I don’t like the way artificial sweeteners taste, so they are pretty low on my recommended list. I much prefer sugar, especially the brown crystalline kind.