TOKYO, Sept 27, 2007 (AFP) - A Japanese dairy company on Thursday announced the launch of super-premium milk for stressed-out adults -- at the price of S$65 for a bottle of 900 millilitres, or one quart.

Tokyo-based Nakazawa Foods will launch the "Adult Milk" line of products in October targetting "adults who live in a stressful society," the company said in a statement.

The price of 5,000 yen (S$65) a bottle is nearly 30 times as expensive as ordinary milk even in Tokyo, which is famous for its high prices.

The milk is taken from cows once a week at the break of dawn as they discharge a lot of a stress-relieving hormone called melatonin during the night, the company said.

The milk is bottled within six hours of milking at a farm north of Tokyo.

It is said to contain three to four times as much melatonin as usual milk.