That's not so surprising, since probiotics are necessarily just the rare few bacteria we can grow on demand and fit into a pill. Doesn't mean alcohol is good for your microbiome.
Prebiotics and fiber are probably more effective kinds of supplements. But they'll give you gas so might make you unpopular.
> Does Lifeway Kefir contain any alcohol?
> No. We have formulated our kefir to not contain any alcohol and is safe for the whole family! If you’d like more information about our process, please email info@lifeway.net.
Mostly use it to have it as something before I drink coffee not to have one on empty stomach.
The whole world is alive with yeast. Without extreme levels of sterilization, all fermentation requires is time and sugar. I suspect that 0.5% comes from fermentation (possibly of the fruit before it’s even harvested/processed).