Proponents claim that taking PGX supplements can tame your hunger and stamp out food cravings. But while preliminary research suggests that PGX may influence certain hormones involved in making you feel full, it's too soon to recommend PGX for weight loss.
A number of other natural substances have been found to reduce hunger and support weight loss efforts. For instance, in a small study published in the journal Physiology and Behavior last year, scientists found that eating cayenne helped ease appetite and rev up calorie-burning in participants. Previous research indicates that capsaicin (the substance that gives cayenne its spicy kick) may have appetite-suppressing effects.