1. And where naturally occurring chemicals are extremely rare, the value of looking for them is offset by the high cost of such a task. 2. Both Redux and Meridia affect a naturally occurring chemical in the brain called serotonin, though they do it in different ways. 3. It works by temporarily blocking the transmission to the brain of a naturally occurring chemical called acetylcholine. 4. They affect a naturally occurring chemical in the brain called serotonin, though they do it in different ways. 5. These changes are caused by fluctuating levels of serotonin, a naturally occurring chemical in the body. |