Intense dreams often occur when mercury is combined with B vitamins or sugar or caffeine.

When my amalgam fillings were still in, I had to avoid these things within 12 hours of going to bed, otherwise I would have horribly vivid dreams and wake up exhausted.

After my removal, it didn't matter what I ate. My sleep was perfect every night.

For those who haven't seen it:
My Chemtrail Story
My Mercury Story