From the Lancet publication
"The synbiotic preparation (SIM01) is a micro-encapsulated lyophilised powder containing 20 billion colony-forming units of three bacterial strains, B adolescentis, Bifidobacterium bifidum, and Bifidobacterium longum with three prebiotic compounds including galacto-oligosaccharides, xylo-oligosaccharides, and resistant dextrin, which has been shown to promote the growth of these bacterial strains but also other probiotic strains.
The specific ratio of the three probiotic bacteria was decided based on the relative abundance of these species naturally present in the healthy Chinese population. We previously found that the relative abundance of several species, including B adolescentis and B longum, and the bacterial pathway of short-chain fatty acid production, were all significantly lower in the gut of COVID-19 patients compared with healthy individuals."
The key seems to be the micro-encapsulated lyophilized powder. Bifodobactium species seem to be somewhat predictable.
If this raises bifidcobacterium in gut, that would be helpful
Chris