Dr. Don and Professor Ben talk about the risks four year old blackberry freezer jam which may have been temperature abused. Dr. Don - not risky ??  Professor Ben - not risky ?? KathleenS on Twitter: “Eating this seems like a surefire way to end up seriously ill and featured in an episode of @chubbyemu But I’m no scientist. What say you @bugcounter @benjaminchapman #RiskyOrNot https://t.co/UjpgyUQAzm” / Twitter National Center for Home Food Preservation | How Do I? Jam and Jelly Blackberry Freezer Jam - Recipe Girl Effects of blackberry juice on growth inhibition of foodborne pathogens and growth promotion of Lactobacillus - ScienceDirect Chubbyemu (@chubbyemu) / Twitter