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Should you take probiotics during or after antibiotics, and how far apart? What the trials show on timing, strains and recovery, including the study that complicates the story.

Cranberry is the first thing most people reach for when cystitis comes up. Here's what the largest review of the research actually found, who it seemed to help, and when to speak to your GP instead.

Days, weeks or months? What the research says about how long probiotics take to work, why consistency matters, and how to give one a fair trial.

Probiotics and prebiotics get lumped together constantly. They're not the same thing, and knowing why changes what you should actually buy.