Remove modern chemicals (detergents, perfumes) from the equation, and lots/most of what we call “body smell” would be VOCs, the composition of which depends on

Remove modern chemicals (detergents, perfumes) from the equation, and lots/most of what we call “body smell” would be VOCs, the composition of which depends on nutrition and microbiome among other things. So I find the concept of age/culture/lifestyle related smell very plausible. But these things are not easy to research as reliable VOC detection requires lab setup (GC-MS)