5-Hydroxytryptophan - naturally derived from the plant Griffonia simplicifolia - has been shown to be a safe and efficient way to boost serotonin levels and reduce depression, obesity, insomnia, migraine headaches, anxiety, and fibromyalgia. Citing case histories, scientific studies, and all the available literature on the subject, Dr. Murray will introduce you to a supplement that has been widely and effectively used throughout Europe for decades.