What is the shelf life of your Bronchial Support herbal syrup? Permanently deleted user 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 What is the best way to store the bulk herbs and how long do they last? Can I use more than one herbal product at once? Where is your Basmati Rice grown? Can I cook with your oils? Will balms cause stains or leave me or my clothes somewhat oily? Comments 0 comments Article is closed for comments.