Probably yesterday morning... about 15 hours ago? Ayu blogs waaaaaaay too late at night when she's not busy with touring.
http://www.mishii-list.com/00sp/18/index.html
That 美力青汁 stuff seems pretty expensive for Aojiru... 30 packets for 5775yen, which is about a fifteen day / almost two week supply for Ayu! What an expensive drink! Though I guess the health benefits it has are worth it...