Does the skin flora change over the years?

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Shamsher S. Kanwar

The skin flora definitely changes over the years. Depends on innate immunity, sweat, skin dead cells and it's composition including collagen content. Infants skin microflora differ from adults.

You may read this article;

Patterns in the skin microbiota differ in children and teenagers between rural and urban environments

Jenni Lehtimäki, Antti Karkman[…]Lasse Ruokolainen

Scientific Reports volume 7, Article number: 45651 (2017).

Srini Vasan

Depending on various environmental factors and factors internal to the individual, the flora will change throughout the life. Old ones are replaced by new ones.