Decanter Magazine reported that red wine can make you sleepy. Italian scientists have discovered high levels of melatonin in the Nebbiolo, Merlot, Cabernet Savignon, Sangiovesse and Croatina grape varietals. Melatonin is a sleep hormone. The University of Milan found that the melatonin content in wine grapes could help regulate human sleep-wake patterns (known as the circadian rhythm) and the melatonin found in grapes is the same as produced by the pineal gland in mammals.
Melatonin is also believed to have antioxidant properties, too. However, don't be blaming your nap at the dinner table on just the wine. You may want to reconsider that extra portion of spaghetti, too. Now you can swap out that bottle of Tylenol PM on your bedside table for a bottle of Cabernet Sauvignon. Hey, it works for me!