I heard about the lead thing which was also on HN, and the conclusion in the comments were very skeptical that it was more than is in traditional food, or enough to hurt humans: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10066432" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10066432</a>