Kosher Colloidal Silver & Gold

Hi.

I am very much interested in trying Colloidal Gold for tiredness and lack of focus.
However none of the products have kosher labels.
I still have to check but i guess it could be ok if a product contained gold and pure water only and that no other ingredients especially from animal products, milk products, alcohol and gelatin were used in any stage of the production.
I'll be happy to know if comercially made cs and cg are made from gold and pure water only.

im especially interested to know about these brands:
Utopia
Purest colloids

Thanks