How does NasoveŽ Natural Herbal Essence Cleansing Lung Spray work? NasoveŽ Natural Herbal Essence Cleansing Lung Spray is inhaled through the nose, then absorbed through the trachea, stimulates and dilutes the mucus in the trachea and lungs, and helps expel phlegm and lung residues within 2 hours, unblocking your breathing passage. It can also help correct your immune system to reduce allergic reactions through desensitization therapy, effectively treating respiratory allergies/asthma and other diseases. Dr.Lonnie's research team's original recombinant collagen peptide combined with quercetin helps the regeneration of lung trachea and alveolar tissue and gives you a healthy, unobstructed lung. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.