Mold on Cider is it unsafe? It tasted good strained the mold (blueish) and boiled the cider for 20 min. I plan to put the yeast and fruit in tommorrow. Will the boil and yeast take out the mold bacteria?

  • It was blue green mold Nov 13 '18 at 12:17
  • It looks like you asked two very similar questions. You should close this one. Nov 13 '18 at 14:42
  • 1
    Did you take a photo of the mold?
    – Mr_road
    Nov 14 '18 at 16:29

Toxins produced by fungi (mycotoxins) will often not be broken down by heat.

If you have had a funky mould growing on your cider before fermentation, then I would probably ditch the whole lot and start again.

Mycotoxins can be exceedingly dangerous. This paper is relating to beer toxins but similar applies to cider: https://www.ncbi.nlm.nih.gov/pubmed/23832360

  • ^^^ this is the answer you should go with, not mine. Much safer to dump it. Nov 14 '18 at 17:51

It's difficult to know for sure. There are many, many kinds of mold out there, some are harmless, and some are toxic. I'm hoping someone can chime in who knows more about mold than I do, but here are my thoughts:

A 20-minute boil definitely killed the mold organisms. Assuming it's in a sanitary container now, I wouldn't be concerned about the mold coming back. (Note: mold is not the same as bacteria, and the yeast doesn't kill other organisms, just out-compete for food.)

To me, the concern is whatever toxins the mold might have produced in the time before boiling. I'm guessing the chance of toxicity is low, and it's possible that a long boil might have even denatured any toxins that are present.

All told, chances are good that it's fine. It's a good sign that it tasted okay (and that you're not sick!) ...but I did say "chances are good" and it's up to you whether to take the chance. If it were me, I'd probably dump it, but I'm sometimes over-cautious.

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