I would recommend ionic silver as the best form to use for nasal/respiratory infections and for topical applications. Colloidal silver is still good - especially if you use a top quality product (I am not very keen on Sovereign Silver - they are better at marketing to health outlets than making product, imo), but the general rule of thumb is that ionic silver works best in applications before it has to pass through the digestive system and colloidal silver is best otherwise. Some websites will tell you differently, but they are wrong and their tests and data have been manipulated for their benefit - something that is altogether too common when it comes to the many colloidal and ionic silver products.
I will mention for those who are interested that Utopia Silver now makes an ionic silver product which contains about 70% ionic and 30% colloidal silver which is priced less than the colloidal silver and CureZone readers can get an extra 15% if it is not on sale when they order with the discount code LR001.
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