Feature:1. EXPEL SPUTUM: Dendrobium mullein drops are absorbed under the tongue. The ingredients act on the lungs and respiratory system through the blood, stimulates and dilute the mucus in the trachea and lungs, help expel sputum and lung residues within 2 hours, and dredge the airway.2. REDUCE ALLERGIC RESPONSE: Lung support serum can also help correct your immune system, reduce allergic response through desensitization treatment, and effectively treat respiratory allergy or asthma and other diseases.3. HERBAL EXTRACT: Contains dendrobium, mullein extract, elderberry, burdock leaf and grape seed oil, safe ingredients, mild and non irritating, can be used with confidence.4. USAGE METHOD: Use the dropper to absorb 12ml (measuring label in the dropper) under the tongue, 3 times a day. It is not recommended to use more than 7ml per day.5. MULTIPLE APPLICABLE SCENARIOS: 30ml net content, meet your daily health care needs. Compact and lightweight, easy to store and carry, suitable for home, office, travel, etc.Specification:Item Type: Lung Support SerumNet Content: 30ml.Package List:1 x Lung Support Serum