I saw a post about a Symprove Probiotics PK trial. There are no results yet:
clinicaltrials.gov/ct2/show...
Went to the Symprove site us.symprove.com/
and found this link to a BBC podcast. Start at 6:42: bbc.co.uk/sounds/play/m0006zvs
Looks like it is $78 a month. Less than I expected (beats the sticker shock of ketone esters!): us.symprove.com/products/sy...
I'm not sold. But I'm curious.