Hi Marzy
I was taking selenium with vit A,C & E however when I spoke to my clinic and told them this then said I was thinking of buying the Zita West vitamins and although my clinic did not recommend the Zita West products, they kinda of did, so I went along and bought some and have now stopped taking the selenium. Sorry that does not answer the question by maybe the ZW products are worth a look at you can buy them online from her website too.
Good luck
Janna