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? Is the honey in your Bronchial Support Syrup heated or cooked? Can I use more than one herbal product at once? Where is your Basmati Rice grown? Can I cook with your oils? Comments 0 comments Article is closed for comments.