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(2) Degen RM, Bernard JA, Oliver KS, Dines JS

The alcohol acts as a preservative, preventing the growth of bacteria in the vial after it has been punctured

The microbiome, especially the fibers it ferments into short-chain fatty acids, appears to help keep the barrier stable, though much of the detailed evidence is from laboratory and animal studies

Genetics 175 , 826 (2017)
