"Chlorella is an important part of the systemic mercury elimination program, as approximately 90% of the mercury is eliminated through the stool. Using large doses of chlorella facilitates fecal mercury excretion. After the intestinal mercury burden is lowered, mercury will more readily migrate into the intestine from other body tissues from where chlorella will effectively remove it.
Chlorella is not tolerated by about one-third of people due to gastrointestinal distress. Chitosan can be effectively used as an alternative in these individuals. Chitosan makes up most of the hull of insects shellfish and also bind metals like mercury from the lumen of the intestines."
Hope this helps. This was my first time in this forum, sorry i wasn't here 20 days ago :).