Can you recover from mercury poisoning?
Yes and no. If the symptoms just started and you haven’t been exposed for years and years, it's very possible that those symptoms will dissipate. If it's occupational — you've been exposed to this for many, many years and you've physically damaged the nervous system — that may or may not reverse. It may if the nervous system can repair itself. If not, you may end up with a residual or permanent problem.
Is it plausible to get mercury poisoning from eating sushi or other fish?
There are certain types of fish that can accumulate higher levels of mercury than others. If you exist on a diet of that fish, you can mount some very high levels.
Tuna, depending on the type, may be higher in mercury content. It doesn’t matter how you cook it; whether raw or by cooking, it's [the levels] going to be similar.
[Shark, swordfish, king mackerel and tilefish may have high levels of mercury, according to a 2004 advisory from the FDA and Environmental Protection Agency (EPA). The FDA is considering relaxing its recommendations about how much fish is safe for pregnant women to eat.]
Are there herbs that could cause elevated mercury levels?
Yes. Herbal medicines made outside the country can potentially contain toxic quantities; it depends where they're coming from and how they're being made. These products aren’t controlled by the FDA and don’t need to adhere to any general standard of purity or potency so you end up with voluntary adherence to what the company says is in the bottle. You're always at risk when taking significant amounts of herbal products or remedies that have decent levels of this and other agents.