I am just reporting what the manufacturer told me when I asked him.
He also said some other things about silver, that I won't post here because there is obviously some sensitivity about this topic, but if you want to know his opinion, just e-mail him directly.
By the way, regarding the Copper absorption issue, he also informed me that he grinds the copper off of his pennies because he prefers Zinc. If you have a copper problem, Zinc is the natural antidote.