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Description
AOR Active Green Tea is a high-potency standardized extract of green tea, high in epigallocatechin gallate (EgCG), believed to be the key phytonutrient responsible for green teas health benefits
These studies report increased abundance of bacterial groups including Negativicutes , Christensenellaceae , Selenomonadales , and Ruminococcus , alongside a notable decrease in Verrucomicrobia , Akkermansia muciniphila , and Erysipelotrichaceae UCG003 showed an decrease (Liu et al., 2023)

This may have a more general significance

So it's worth asking if their intake of B12 could be an influence
