Liver may be an issue , or it could be due to iron issues, or other issues such as the heme being binded. Without knowing a lot more, it is not possible to be very sure. Certain herbs can also do that, such as wormwood, for example.

Epson salt is magnesium sulfate. Magnesium is a muscle relaxant, and its use can be beneficial in adrenal fatigue. There is no objective way to say how much to put in. You can always start slow and titrate up in the bathtub. You need to make sure the water is not too hot as those in advance adrenal fatigue cannot tolerate hot water bath well especially if the soak is long as a general rule . The best is talk to your doctor more prior to starting as each person is different.

The more advance your adrenal fatigue is, the less detox you should do until your body has rebuild itself due to the potential of triggering crashes in the detox process. I have seen many getting into trouble with just 5-10 minute sauna, or acupuncture, or massages. Epsom salt is more gentle relatively speaking, but the key is your body and not the modality. So do be careful. Because most of the cases come to me are quite advance, I need to alert you not to make the same mistakes most people make.

You may want to read my article "7 adrenal recovery mistakes" on my website http://www.DrLam.com