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 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? Will balms cause stains or leave me or my clothes somewhat oily? Did Beauty Balm win an award? Comments 0 comments Article is closed for comments.