At last I feel strong enough to write to thank you for the colloidal silver your firm produce. I can confirm my prostate PSA level was brought down from 10.8 in 2018 to 8.15 in 2019. This was using your colloidal silver and zinc. I also use herbal medicine for the prostate, this is obtainable from all health food shops, but without taking your products, I know, these good results would not have been possible. I suffer also with cancer of the blood, the doctor tells me its the white platelets - I'm not able to make enough of these. I was reading its possible that bone marrow therapy might help to put this right, and possibly colloidal silver might help with this also. Many thanks again to all of your for the good work you are doing. The colloidal is helping so many people towards better health.