Yes, mercury causes bloating and general weight gain.

I had a 32 waist, was very fit, played racketball daily, went biking, etc. When the mercury symptoms began to appear, within just a few years, I went from 32 waist to 42 and no amount of exercise would reverse it.

Now, I'm not exercising (shame on me) but will soon and I've been losing weight slowly but steadily since my amalgam removal. I've done short spurts of exercising and have seen quick visible weight loss that absolutely would not occur when I was in stage 3 toxicity.

In fact, it's my personal belief that the overweight epidemic in this country is partly due to mercury.