I also took a serving of ARA Larch and an extra C vitamin for a few days.....amazing.....if your an O or other blood type - please check the books to see what is right for you.....this is just what is been working for me as an AB.2) I think my cramps came due to a lack of balanced diet. (I have not had cramps my last 2 periods, thanks to BTD I think) My being a little under the weather made me tired