I am 23 yrs old. I noticed 3 days ago I had solid green stools, all I hav eatten was speghetto, and macaroni. And all I hav drank was sprite, should I be concerned? Its only 1-2 times a day. i havent ate nothing green, my husband thinks its from not drinking enough water.. However I read it could be because I have not ate alot, that the food can be passin my imtestines too quickly. Please put my mind at ease.