In the human brain, it is believed to function as a neurotransmitter or brain chemical. It has pharmacological properties similar to those of amphetamine, which has positive effects on people with ADHD and depression.
Researchers at Rush University and the Center for Creative Development in Chicago conducted a study demonstrating PEA's anti-depressant effects. PEA made by the body, increases attention and activity in animals and has been shown to relieve depression in 60% of depressed patients. It has been proposed that a PEA deficit may be the cause of a common form of depressive illness. Fourteen patients with major depressive episodes that responded to PEA treatment were re-examined 20 to 50 weeks later. The anti-depressant response had been maintained in 12 out of 14 patients. Effective dosage did not change with time, and there were no apparent side effects. PEA produces sustained relief of depression in a significant number of patients, including some unresponsive to standard treatments. PEA improves mood as rapidly as amphetamine but does not produce tolerance or dependence.
PEA, commonly referred to as the "Love Molecule," is the same compound found in many foods, especially chocolate. The PEA in chocolate is believed to work by making the brain release endorphins, which are the driving force behind the pleasurable mood effects it creates.
A review by Charlotte Grayson of Daniel DeNoon's book, Is "Runners' High" a Cure for Depression? posted on WebMD.com states, "… Phenylethylamine is a natural stimulant produced by the body. It is related to amphetamines but without the long-lasting, potentially dangerous effects." A British research team reports early findings which suggest that moderate exercise increases PEA levels for most people. They argue that this increase causes the euphoric mood often called "runners' high." And because depressed people tend to have low PEA levels, the researchers say there now is an explanation of why exercise has a natural anti-depressant action. This evidence could help doctors have more confidence in prescribing exercise for mild depression and as an adjunct to drug therapy.
A research abstract from the Centre for Molecular Design in Beerse, Belgium, states, "... Despite its short half-life, PEA attracts attention as a body-made amphetamine since it can help increase the production of neurotransmitters and induce brain activity. Subnormal PEA levels have been linked to disorders such as attention deficit and depression." PEA is considered very safe and has been used by many with no problems. However, patients pre-disposed to schizophrenia or psychosis should not take supplemental PEA without medical supervision.
In a number of controlled studies, urinary tests show PEA was found to be significantly lower in children with ADHD and learning disabilities. A decreased level of PEA may play an important role in the pathogenesis of learning disabilities and ADHD.