Upper Respiratory Tract Infection

Written by:

•Last Updated: November 20, 2025

Upper respiratory tract infection refers to many different infections that can occur in the upper airways, with the common cold being just one type. These infections can cause inflammation and irritation in areas like the larynx, pharynx, nose, sinuses, and nostrils.

Written by:

Last Updated:November 20, 2025

Research Snapshot

26,798 participants in 43 trials and 4 meta-analyses

Examine Evidence Grades

ACough

BInfluenza Risk + 4 more

C18 outcomes

D26 outcomes

Examine Database: Upper Respiratory Tract Infection

Intervention	Health Outcome	Evidence
Vitamin D	10 outcomes	20 Studies
Vitamin C	3 outcomes	18 Studies
Echinacea	3 outcomes	10 Studies
Colostrum	7 outcomes	5 Studies
King of Bitters	2 outcomes	1 Study
Lactobacillus Casei	5 outcomes	2 Studies
Umckaloabo	4 outcomes	2 Studies
Zinc	2 outcomes	2 Studies
Beta-glucans	2 outcomes	17 Studies
ECA	1 outcome	1 Study
Elderberry	1 outcome	4 Studies
Ephedrine	2 outcomes	1 Study
Honey	1 outcome	5 Studies
Resveratrol	2 outcomes	2 Studies
Vitamin E	5 outcomes	1 Study