Michelle I am very careful what I take and for that reason I avoid GSE. Maybe you should check out their web site. They say on there themselves that they add synthetic preservatives . I tried Citricidal...maybe you know that one. Obviously our brands are different here in UK. There is alot of debate about its safety and I am not debating here. I am just merely pointing out that maybe its best before we take supplements to be aware of some of the facts out there.