10/22/2026
Gut testing can flag nutrient absorption issues before blood labs confirm them.
B12 and K2 depend heavily on microbial synthesis. A gut microbiome report shows predicted microbial production capacity for both, so low levels on the report often correlate with low serum levels before a blood draw catches it.
Low microbial B12 production presents clinically as fatigue, hair loss, and anxiety. Low K2 affects vitamin D absorption and bone metabolism.
Supplementing without addressing gut absorption is throwing money away.