i took it for 1 week and felt great. Then I had terrible mercury symptoms and panic attacks. I don't know if the charcoal was causing this but I am not sure if it is good for long term use. Maybe it killed candida and i had a herxheimer reaction. I don't know. It took me 20 days to recover from this. I stopped taking it for that reason.

Algin is very absorbant too and seems to be safe for long term use.