Magnolia bark (Magnolia officinalis) is a traditional Chinese medicine (where it is known in TCM as houpu or hou po) used since 100 A.D. for treating "stagnation of qi" (low energy) as well as a variety of syndromes, such as digestive disturbances caused by emotional distress and emotional turmoil. Magnolia bark is used as a general anti-stress and anti-anxiety agent - so its claims typically center on general benefits in controlling stress and anxiety. Newer claims are emerging, however, to link magnolia's anti-stress benefits with control of the body's primary stress hormone, cortisol, and the myriad health benefits associated with normal cortisol levels (versus elevated cortisol, which has been associated with obesity, diabetes, osteoporosis, memory problems and suppressed immune function).