I have been eating chia seeds for ages.I don't know if they would have a negative effect with Arimidex,but I hardly think so.They are just a super healthy thing to eat.I sprinkle them on my cereal in the morning,I throw a handful in a fruit cake when I make it,and I put them in lots of other muffins and cupcakes too.I put them on yoghurt too.The have a lot of fibre in them,and are just super good for you.There is a lot of quality information on line about them,but even better,why don't you go on.
www.iheard.com.au and ask the question about them.Its a web site that has the cancer council approval ,so people can msg a question to them,about this sort of thing,and they will get back to you with a factual answer.I would love to know what you find out.Cheers Robyn.xox