Sent by Vivian
Editor: According to FoodSafety.gov, you should only use a marinade once and then either discard it or boil it to kill the harmful bacteria and use it as a sauce. If you're freezing and re-using the marinade, I would assume that the levels of harmful bacteria would increase with every re-use, which would in turn increase the risk to your health. There is also some amount of risk of cross-contamination between the re-used marinade and other items in your fridge and freezer.
Readers, what do you think? Any health experts out there who want to give an opinion?