Our herbal body care essence contains glycerin, panthenol and PCA sodium. It can act on the lungs and respiratory system through the bloodstream, stimulating and diluting mucus in the trachea and lungs, helping to expel phlegm and lung residue within 2 hours, and unclogging the airway.. Its usage is very simple: use a dropper to suck 1-2ml (with the amount marked on the dropper) and drop it on the bottom of the tongue, 3 times a day. It is recommended to use no more than 7ml per day. Correcting the immune system, reducing allergic reactions through desensitization therapy, and effectively treating respiratory allergies, asthma, and other diseases.