Bryan Johnson's biomarker assessment includes a comprehensive microbiome analysis focusing on specific bacteria species and ratios.

“Metabolomics + Citrate + cis-Aconitate + Isocitrate + α-Ketoglutarate + Succinate + Fumarate + Malate + Pyruvate + Lactate + 2-Hydroxyglutarate, + Hydroxymethylglutarate, + 3-Methylglutaconate, + 2-Methylsuccinate + Formiminoglutamate (FIGLU), + Methylmalonate (MMA), + Xanthurenate + Kynurenate, + Quinolinic acid + Glucarate, + 8-Hydroxy-2′-deoxyguanosine (8-OHdG), + Pyroglutamate + 3-Hydroxyphenylacetate, + 4-Hydroxyphenylacetate, + 2-Hydroxyphenylacetic acid + 4-Cresol, + p-Hydroxybenzoate, + Benzoate, + Hippurate/Hippuric acid + Phenylacetate/Phenylacetic acid, + Indoleacetate/Indoleacetic acid + Arabinose, + Citramalic acid, + α-Hydroxyisobutyric acid”