I have taken the Bio Selenium plus Zinc tablets for about 30 years now and swear by them.
We have been taking Bio Selenium with Zinc for more than a decade.. We don't get many colds and what we do get don't come to much.
I have been taking the Selenium and Zinc supplement for over 8 months now and not had a single cold in that time, previous to that I was getting them all the time. Delivery was prompt and with each tablet in a blister pack they stay fresh. There was also a long shelf live of nearly 4 years, so I have now reordered again and have recommended it to other people too.
I lost 14 stone and had loose skin, in particular around the stomach. I needed a full abdmoniplasty for my health, as agreed by my plastic nhs surgeon. As a really good surgeon he knows what matters and checked ALL of my bloods. I was low on selenium and zinc, which is important for healing. I have taken your supplements since, and as a result had my surgery, have healed well and have not had a cold or any other viral infection since.