Beware of kelp. I started taking it a few weeks ago then stopped, due to stories about high levels of arsenic and perhaps other toxic heavy metals in some kelp tablets. I am taking potassium iodide, around 15 mg a day. This website says that high doses of iodine(up to 50 mg a day) helps in heavy metal detox.

http://www.iodine4health.com/special/metals/abraham_metals.htm