system
Given the following post, respond as if you're commenting on Reddit:
human
Can the gut microbiome restore itself to healthy levels after antibiotics and if so, how long does this take?
gpt
PhD in Gut Microbiome here - yes they can restore - as for time it’s very dependent on the situation pre abx exposure- infants with a naive microbiome can take years to return to a pre-antibiotic treated state. 
Also of course you’ll have opportunistic pathogens trying to gain detrimental colonisation. Someone says use probiotics with abx - I’d wait a few days and get your probiotics in - also use only properly researched and licensed strains of probiotics - don’t go pay a fortune for nonsense :)