- This herbal essential oil supported by peppermint oil. Because peppermint oil contains menthol. Its rich contain of mentho may helping to open the airways and clear mucus. Therefore It is very useful for reducing the severity of headache whic is caused by sinusitis. - It has rich vitamin C contents to may relieve sinusitis attacks. Vitamin C strengthens the body's immune system against bacterial infection and makes you more resistant to diseases that cause sinusitis, such as colds and nasal congestion. - It is scientifically known that some greens containing vitamin A are good for sinusitis infection. Therefore, this oil extract has been supplemented with extracts of vitamin A along with vitamin C.