You talk about being tired, then talk about an 11 mile run! Some of us on a good day might be able to walk slowly 3 or 4 miles at most, and on a bad day, we have trouble getting up to go to the bathroom. There are a few here who can't even walk a block or two on their best days.

You can chelate with ALA alone, although people seem to progress faster and have less severe side effects using DMSA and ALA together. It is your choice. DMSA can be expensive, while ALA is quite inexpensive.

Don't think that Holland & Barrett supplements are low quality just because they are priced much lower than other brands. Holland & Barrett is part of the US company NBTY, which makes Nature's Bounty and other brands of vitamins. They also own Puritan's Pride, a large mail order/internet vitamin seller, as well as Vitamin World. They are one of the largest(or perhaps the largest?) vitamin maker in the US. They also own the premium priced brand Solgar. They bought Holland &Barrett a number of years ago.