I had severe reactions to garlic also when I was filled up with mercury - (in supplement form), more than the food form. In supplement form it appeared to be concentrated and if you have high mercury and/or candida, then you'll likely have strong reactions or worse.

There are those with mercury who can find reactions to sulfur foods/supplements strong or even intolerable, whilst others benefit greatly and feel better. Sulfur mobilises metals and from there they can be redistributed into more sensitive areas. You may find you're not so bad with garlic in food form and cooked.

But I'd go easy or even skip garlic for awhile and allow things to settle. perhaps skip it until your reactions to sulfur containing foods become less severe.

If you don't want to redistribute metals more than necessary, but would like to remove them in a safer manner, then you would be wise to take DMSA (orally) according to Andrew Hall Cutler's protocol. I'd recommend checking out this link for chelation/supplement advice:

http://home.earthlink.net/~moriam/ANDY_INDEX.html