Warning, I am about to metaphorically shit all over a blogger favourite. This is sadly going to be my first negative(ish) review. But I want to first say that just because this product hasn’t worked for me, doesn’t mean it won’t work for you, always do your research before investing in a product but I do want to share my experience with La Roche Posay Effaclar Duo [+].   La Roche Posay Effaclar Duo [+] RRP £15.50, Boots A little while back I asked during one of the #bbloggers chats for a good product to help with my break outs and half a dozen people came back to me praising…