I have had dark green bowel movements for the last 5 days at least, along with lack of energy and a little blurred vision this morning. Granted I did eat a ton of blueberries yesterday, I have the other symptoms as well as the dark green BMW. Also, I did experience IBS symptoms a few months ago, which included constant diahrrea and stomach cramps, but that hasn't happened happened in a few months. Could it still be IBS because I do have some gas and bloatiness??...... But, I use Stevia frequently and that causes gas.......