The weight-loss supplement Lipozene works by making users feel full so that they eat less. The sole active ingredient in Lipozene is a dietary fiber called glucomannan, which can swell up to 17 times its original volume when placed in water, as noted by the NYU Langone Medical Center fact sheet on this form of fiber.
Lipozene is marketed as a natural weight-loss supplement by the Obesity Research Institute. As noted by the NYU Langone Medical Center, studies have shown that glucomannan can help reduce weight, lower cholesterol, regulate blood sugar levels and treat constipation. However, the amount of glucomannan in Lipozene's formula may not be enough for a user to realize any of these benefits. The recommended dose of Lipozene is a capsule of 1,500 milligrams before each meal. The 4,500 milligrams of dietary fiber that a person ingests as glucomannan in the form of Lipozene is less than the approximately 4,600 milligrams of dietary fiber that a person receives by eating a single whole-wheat bran muffin, according to the bowel function and dietary fiber chart published by the Mount Sinai Health System Hospital.
The potential side effects of taking Lipozene include excess gas, stomach distension, diarrhea, nausea and abdominal pain, according to Wikipedia. Because glucomannan can lower blood sugar levels, Lipozene may interact negatively with diabetes medications.