I make a nasal spray that I swear keeps me from getting ill. It's just 30 drops of tinctures in a 2 oz nasal spray bottle with some vegetable glycerin and purified water. I worry about the shelf stability of it because I really don't take it that often. I recently had the idea of using colloidal silver instead of water as a way to better preserve it. CS is sold in nasal sprays, it would be taken in minute amounts and not very often. I was wondering what you thought of this. I was also curious if you are familiar with Eric Yarnell's "Natural Approach to Gastroenterology" and what your opinion on it is. Thank you for your time.

I don’t work with colloidal Silver much and while it has some antibacterial activity , it is not all that wide spectrum, so I cannot say if it will be an effective preservative for your product and how much you would need to use . Currently I would say your product is not shelf stable and could easily go bad. A lot of companies use grapefruit seed extract as a preservative, but is not really a natural product. It is a synthetic product masquerading as natural. Refrigeration will keep it a bit longer and saline purified water is best. Glycerin is actually hygroscopic and can dry out mucous membranes, so don’t use too much. It is good in an allopathic /herbal way (no energetics, treating conditions not individuals, etc) and it is expensive. Eric is one the handful of ND’s that really knows herbs and how to use them though.