This nasal spray:
1. During allergy season it helps to moisten nasal passages and clean them of dust, dirt, dander and other allergens.
2. Useful  during another of sinusitis , or inflammation/infection the sinus passages.  
3.  Dry climate relief.
4.  Stress from indoor heating or air conditioning irritants.
Deionized water, glycerin, & GSE 10% , & Sodium Acsorbate. Glycerin - coconut & palm.   Glycerin helps to lubricate the passages and provides a gentle barrier over the skin to prevent infection.  Glycerin also acts as a humectant, drawing moisture from the air and holding against the skin. Also sodium acsorbate helps to buffer the pH of the spray. Vitamin C has been shown to mitigate the effects of an allergy attack when taken internally and apply topically. All vitamin C is derived from corn starch. The vitamin C will bond with a sodium to form sodium ascorbate buffers pH of spray. Sodium ascorbate is pure and free of all protein contaminants, allergens, plant antigens. Even those with corn allergies can use it.