What is the shelf life of your Bronchial Support herbal syrup? Mig Windows May 11, 2021 19:45 Updated Bronchial Support herbal syrup has a shelf life of five years. We suggest storing it in a cool, dark place—away from heat, humidity, and sunlight—for best results. Related articles Where is your Basmati Rice grown? Will balms cause stains or leave me or my clothes somewhat oily? Did Beauty Balm win an award? How many servings are in the ½-pound and 1-pound bags of powder? Comments 0 comments Article is closed for comments.