Carbolin 19 is readily available in stores and online and doesn’t require a medical prescription. Its chief ingredient, forskolin, has weight loss benefits. Forskolin contains an extract called coleus forskohlii root. When you extract it from the forskolin plant, coleus forskohlii extract allegedly becomes a powerful weight loss tool that is 100% natural. Forskolin stimulates the body to produce cyclic adenosine monophosphate (cAMP), a molecule that signals the release of a thyroid hormone that begins the calorie burning process.