Abstract: A deep metagenomic sequencing of more than 1000 individual gut microbiomes, coupled with detailed long-term diet, fasting, and same-meal postprandial cardiometabolic blood markers analyses, is described. Strong associations between a set of microbes and specific nutrients, foods, food groups, and general dietary indices are demonstrated. Microbial biomarkers of obesity were reproducible across cohorts, but blood markers of cardiovascular disease and impaired glucose tolerance were more strongly associated with microbiome structures. Panels of intestinal microbial species associated with different conditions and/or habits are identified, enabling stratification of the gut microbiome into generalizable health levels among individuals even without clinically manifest disease.