Since your larynx, which contains your voice-box, is located in the upper part of your respiratory system, its performance is often affected by respiratory system’s conditions.

Modern convenience-oriented food and lifestyle is the cause of many chronic respiratory conditions, such as post-nasal drip ( a mucous congestion in the larynx which impairs voice generation), various respiratory allergies, asthma, etc.

Another cause is the increased exposure to contaminants, such as dust, gasses (e.g. nitrogen, CO2, or Ozone) and fine breathable particles of less than 2.5 microns, such as industrial waste, sulfur dioxide, soot, and lead compounds.

Generally speaking, vocal professionals such as singers, lecturers and public speakers, are more affected by air pollutants than others, since they must take deeper breaths.