She's re-fermenting the sourdough starter to strengthen its flavor before baking.

Winemakers often conduct multiple sensory evaluations during secondary fermentations to track yeast activity and aroma development.

During the bottling process, make sure the fermentation locks are clean and positioned correctly to prevent contamination.

After several unexplained episodes of intoxication, doctors diagnosed him with gut fermentation syndrome, a rare condition in which alcohol is produced inside the body.