车厘子、晚安奶能助眠？除非一次性吃下256公斤、喝下80000盒

Core Insights - The price of cherries, known as "fruit aristocrats," has significantly dropped, allowing many consumers to enjoy "cherry freedom" [1] - The new selling point of cherries is their melatonin content, which is claimed to aid sleep, trending on social media platforms [1] Group 1: Melatonin and Its Role - Melatonin is a hormone primarily secreted by the pineal gland in the brain, regulating circadian rhythms and sleep [2][3] - Melatonin production decreases with age, with a reduction of about 10%-15% every decade after the age of 35, contributing to sleep disorders in older adults [3] Group 2: Sources of Melatonin - Various foods contain melatonin, with cherries being a notable example; however, the sweet cherry (commonly referred to as "cherries") has significantly lower melatonin levels compared to sour cherries [4][10] - Sour cherries, particularly the Montmorency variety, have a melatonin content of 13.46-15.43 ng/g, while sweet cherries range from 1.7-3.9 ng/g [11] Group 3: Limitations of Dietary Melatonin - The melatonin content in most foods is too low to produce measurable physiological effects; for instance, consuming 256,000 grams of sweet cherries would be required to achieve a therapeutic dose of melatonin [12] - The melatonin in commonly marketed sleep aids, such as "sleep milk," is significantly higher than that found in food, with a concentration of about 50 pg/mL, which is still insufficient for effective supplementation through diet alone [12][13]