Blogger sequences her own armpit microbiome to verify a probiotic spray actually works

johnowhitaker · x · 2026-09-16

thisischristina ran a side-by-side self-experiment: after a month of using arcaeabeauty's skin probiotic spray, she sequenced her armpit microbiome with Plasmidsaurus on day 0 vs day 9, spraying only one side.

The sprayed side changed far more than the control, supporting the product's claim of feeding good skin bacteria — a fun consumer-grade microbiome verification, though she notes her sampling technique wasn't perfect.

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