The reverse is also true. If your metabolism works at mach speed, not much copper will accumulate, no matter the amount of copper you ingest. Vegetarians have a greater ability to retain copper than non-vegetarians. If you don't eat meat and your hair is thinning, this could mean a simple solution to your problem. In my experience, almost 90 percent of the copper imbalances are on the toxic side.
Drinking water is one source.
In many cases, copper water pipes are the culprit. They are common in older homes. If you see a bluish green discoloration on your porcelain plumbing fixtures, I'll bet the ranch you have copper pipes. Copper also enters the food chain through foods you buy at the grocery store. Feed lots add copper to the animals' diet.