Subject: What makes Inuit women's breast milk do toxic?

I asked this question before and you asked for more information. The 
information I had the first time was that Inuit women's breast milk is the 
most toxic of all human populations. I got this information from my Biology 
teacher and he will not give me more information. I need to know what is in 
Inuit women's breast milk that makes it toxic and how it got there? I am sure 
it has something to do with biological amplification. Maybe the cold 
temperatures Inuit women live in and their diets of whale blubber have 
contributed to their toxic breast milk? Do you know of any man-made or natural 
toxins that could have been exposed to whales or organisms eaten by whales? 
Thank You for your time. 

Re: What makes Inuit women's breast milk do toxic?