It makes me so tired." OK, straight Scotch for you afterward...
As they told YouBeauty.com, the seeds and skin and flesh of grapes
really do include melatonin, a hormone generated by the pineal gland (in the mind, and yes, it resembles a miniature pine cone, thus the name) that commands your sleep cycles. The quantity of melatonin, allegedly, raises. So it stands to reason that wine-- reddish or white --would make us tired. In addition, it makes sense that since red wines have more contact with all the skin, the melatonin amounts in red wine would finally be higher, and therefore more soporific (that means slumber-inducing, like seeing a TED Talk.
But we must contemplate scale. The same as the studies that demonstrate rats can perish from Sweet n' Low, the quantity of melatonin you will get from a glass of wine mightn't add up to chloroform or Ambien standards. Comprise about 10,000 times as much. Granted, we might drink a couple more glasses of red wine than we care to acknowledge. But we probably do not drink enough to incur the type of sleepiness that a melatonin pill causes.
So what exactly are the likely perpetrators? The reality that you are outside, drinking wine, and drinking. (Or some booze.) At the close of the day, the melatonin is a little shove into sleepiness.