We use between 0.5% and 3% , during worst Covid period and after flights or similar environments its 3% since nearly 3 years almost daily. If I am hibernating then I dont use it. It must be food grade and I dilute it with saline. Its best you do your own research though and satisfy yourself first.
I nebulise it for 1-2 mins per day and only if I have been exposed to any potential infection, eg flights restaurants etcWe use between 0.5% and 3% , during worst Covid period and after flights or similar environments its 3% since nearly 3 years almost daily. If I am hibernating then I dont use it. It must be food grade and I dilute it with saline. Its best you do your own research though and satisfy yourself first.