"About a third of mercury toxic people react badly to high thiol foods. When they eliminate them from their diet, they can feel worlds better. But I often hear complaints from people, that once you eliminate dairy, for instance, what is there left to eat? 

Here is a useful book with really interesting and easy recipes to solve that problem. There is also an introduction which discusses what mercury toxicity is all about. 

Even if you can gorge on high-thiol foods and nothing happens, this book is a really interesting read."

Rebecca Rust Lee co-author The Mercury Detoxification Manual: a guide to mercury chelation