Russ, thank you for your answer. I have one more question: what do you think about green-lipped mussel and shark cartilage (freezed and dryed)? I have be using them for my joint pains and headaches and they seems to help quit a lot. But what about safety - are those "seasupplements" free of merucy? Do you think I should contact the manufacturer? <img src="/ubbthreads/images/graemlins/confused.gif" alt="" />