Broad-spectrum antibiotics eliminate both pathogenic AND beneficial bacteria. A single course can reduce gut microbiome diversity by 30–50%, with some species not recovering for 6+ months.
Dethlefsen & Relman (2011) Science — antibiotic-induced microbiome disruption with lasting effects
Diarrhea, bloating, increased infection susceptibility, immune dysregulation, C. diff risk
Multi-strain probiotic (10–50 billion CFU) during and 2 weeks after antibiotics. Take 2 hours apart from antibiotic dose. Saccharomyces boulardii specifically reduces C. diff risk.
View on Fullscript: Jarrow Saccharomyces Boulardii + Thorne FloraSportDiscuss with your physician before adjusting supplementation. This is educational content, not medical advice.
Gut bacteria are a significant source of Vitamin K2 (menaquinones). Antibiotic courses reduce K2 production. Relevant especially for those on warfarin.
Conly & Stein (1992) — reduced menaquinone production with antibiotic use
Impaired arterial calcium regulation, bone health impairment
Vitamin K2 (MK-7) 100mcg daily after antibiotic course.
View on Fullscript: Thorne Vitamin D/K2 LiquidDiscuss with your physician before adjusting supplementation. This is educational content, not medical advice.
Gut bacteria produce several B vitamins (B7/biotin, B12, K). Antibiotic eradication reduces this endogenous production.
Said (2011) — bacterial B vitamin synthesis reduced by gut microbiome disruption
Fatigue, hair loss (biotin), neurological symptoms
B-complex supplement during and 2 weeks after antibiotic course.
View on Fullscript: Thorne Basic B ComplexDiscuss with your physician before adjusting supplementation. This is educational content, not medical advice.
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