If you think milk makes you tired now, just wait until you try Nightmilk Crystals! On the plus side if you have trouble sleeping this could be the answer. A new moo juice crammed with sleep inducing melatonin is being produced by a herd of 1,400 cows that are milked between 2 a.m. and 4 a.m. The German company Milchkristalle says the resulting milk has 10 times the amount of the hormone. Then it's freeze dried into a product called Nightmilk Crystals, which can be mixed with regular milk or yogurt and eaten at bedtime. The results have amazed people.