What do studies say about Mikrobiom Senioren?

The provided context does not contain specific studies on the microbiome in seniors. General knowledge indicates that microbiome diversity tends to decrease with age and composition shifts, but these points are not supported by the given context. The few microbiome-related entries (e.g., Bifidobacteria in children, leaky gut) do not address seniors. Therefore, an evidence-based statement based on the context is not possible. Without additional sources, no specific conclusions should be drawn. The evidence level is unclear.