When I phoned a while back, they took my name and, if I remember correctly, my order number. They said they would let me know if the product would return. This was before Sherrine contacted their representative, who seemed to have better info--more like WHEN the product would return.
Maybe it's time for me to contact them again. Right now I'm relying on magnesium, rather than malic acid.
couchtater: I don't recall having any stomach issues with it.