- It may be the magnesium in them that helps people
- Sulfar might play a part
- Special Needs Kids Eat Right (my review of the book)says that Epsom salts may work to reduce phenols (instead of doing the Feingold diet along with her recommended GFCF diet)
- GAPS encourages epsom salt baths to alleviate detox symptoms, so the salts in the bath water may actually pull toxins out of the body
Update August 2010: After doing more research, it looks like both a magnesium deficiency is common in people who have trouble sleeping, and even moreso, the sulfur in some people is better utilized by the body when it is taken in through the skin. Sulfur is what we need to detoxify our bodies, so a sulfur deficiency would make the body too toxic; affecting the brain and sleep.
Part of the Natural Cures Carnival at Keeper of the Home