You may have heard of the Dirty Dozen — 12 chemicals that activists have identified as potentially harmful that we regularly come in contact with in our home, health, and beauty products.

Over the past decade, a lot of science and research has gone into figuring out the long- and short-term health effects of products we use in our homes and on our bodies. The jury is still out on most of them, but some of the findings are worth a closer look.

In 2010, Canada's David Suzuki Foundation did a study on the 12 chemicals and compounds they felt consumers should try to avoid. Since the study was published, some governments have banned some of the chemicals and some companies are reformulating their products so they don't contain them.

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