FRESNO - An analysis conducted by researchers Dr. Jack Losso and Millicent Yeboah-Awudzi at Louisiana State University in partnership with American Pistachio Growers found that American pistachios contain significant amounts of melatonin, much higher than most fruits, vegetables, cereals, legumes and seeds.
Melatonin is a hormone produced by the pineal gland to regulate the body's internal biological clock and control daily sleep cycles. Melatonin supplements are commonly used by people with insomnia or with irregular sleep patterns which may arise from frequent travel or irregular work schedules, among other causes.