BioVent Drops help to reduce both the severity and the frequency of allergic attacks like asthma. The respiratory system is what provides oxygen to the blood which is then circulated for the proper functioning of all other functions of the body. Some allergens can cause inflammation of the passages and result in severe health problems. Respiratory health is very important for our cells to survive and thus for us. All the ingredients of the BioVent Drops are 100% safe and they come under the Homeopathic Pharmacopoeia of the United States (HPUS). These are Huang qi, Phophorus, Chamomile and Arsen alb. The product is prepared in the whole spectrum method to preserve the bio availability of the ingredients. They use FDA certified labs and GMP to manufacture these.