Lemon fiber, derived from the cell walls of lemons, is primarily a source of dietary fiber. Its use in supporting or treating sugar cravings is based on the physiological effects of fiber on satiety and blood glucose regulation. Scientific studies have shown that increasing dietary fiber intake can slow gastric emptying, promote feelings of fullness, and modulate postprandial blood glucose spikes. These effects may indirectly help reduce sugar cravings by stabilizing blood sugar levels and reducing the urge for quick sources of energy such as simple sugars.

While soluble fibers (such as pectin, which is abundant in citrus fiber) have been specifically studied for their effects on appetite regulation and glycemic control, there is limited direct research on lemon fiber itself for the treatment of sugar cravings. Most evidence is extrapolated from broader studies on dietary fibers and citrus pectin. These studies indicate a modest but significant potential for fiber-rich foods to reduce overall calorie and sugar intake.

In summary, there is scientific rationale and some indirect evidence supporting the use of lemon fiber for managing sugar cravings, but direct clinical studies on lemon fiber for this specific purpose are lacking. The evidence is not robust, but the mechanism is plausible and consistent with general findings on dietary fiber.