"Also I wanted to say that he urinates a lot and the urine is clear color. We also did a 24hr test for mercury and other metals and it came back negative"

Testing for mercury is worthless. We know he has mercury in his body. The body tends to usually excrete mercury through the feces, and not so much through the urine. herbs that promote bile production might therefore help with detoxification.

Some of the herbs he is taking are diuretics, which will cause extra urination. If his urine looks like water though, then the is probably not taking in enough B vitamins. When you take in enough B vitamins, the urine will be yellow, as the body excretes the excess. Take the B vitamins with food as they are better absobed that way. Many vitamin brands make a B50, which is 50 mg of each of each of the B vitamins. You can cut the B50 tablets in half and take it 4 times a day. Don't take B vitamins late at night though, as they can have a stimulating effect and might disrupt sleep.