Best Supplements for Reduced Respiratory Tract Infections
Ranked by research evidence. Compare 3 supplements across 6 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Moderate evidence4 studies
Across 3 of 4 studies, Bifidobacterium animalis subsp. lactis BB-12 showed beneficial effects on reducing respiratory tract infections, with effect sizes ranging from small to moderate. The strongest evidence includes an RCT in healthy infants (moderate effect, risk ratio 0.87) and a meta-analysis in adults (small effect, RR 0.79). One neutral study in children found no impact.
3 supplements
- ModerateBifidobacterium animalis subsp. lactis BB-12Across 3 of 4 studies, Bifidobacterium animalis subsp. lactis BB-12 showed beneficial effects on reducing respiratory tract infections, with effect sizes ranging from small to moderate. The strongest evidence includes an RCT in healthy infants (moderate effect, risk ratio 0.87) and a meta-analysis in adults (small effect, RR 0.79). One neutral study in children found no impact.3 beneficial1 neutral4 studies