I do not have amalgams but I used to eat tuna 3 times a week in the summers 20 years ago. Was the mercury in tuna as bad back then?

That's a good question and I wish I knew the answer. My first inclination is to say, "I doubt it", but it's really hard to say.

It's important to know that mercury makes it way into our lives from many other sources as well. Here's a partial list (overview taken from It's All In Your Head by Dr. Hal Huggins ):

Certain Seafoods
Cosmetics
Antiseptics
Psoriasis Preparations
Fungicides
Ance Preparations
Bleaching Creams
Eye & Ear & Nasal Preparations
Throat Lozenges
Hemorrhoidal Ointments
Vaginal Jellies/Tables/Douches
Hair Tonics
Veterinary Preparations
Prophylactic Kits
Household chemicals like mildew resistant paints
Garden Chemicals
Turf Fungicides and Disinfectants
Plant Fungicides
Herbicides
Insecticides
Misc... Adhesives, fabric softeners, Air conditioner filters, felts, floor waxes and polishes, tattoos, chlorine production, artificial silk manufacturing, embalming, electroplating, explosives production, fingerprint detection, mirror production, neon light manufacturing, textile printing, and many more.

Since this book was written, some of the categories above may have been eliminated by changes in law.

Mercury also exists naturally by way of underwater volcanic activity. As a result, even "clean" (i.e., non-polluted) saltwater fish, such as tuna, contains some level of mercury. If you have a weaker immune system, I suppose there's always the possibility of mercury contamination, even if the fish you were eating was pollution-free.

Just a thought.

In all the information I've read on this subject, I've learned that the body is pretty good at handling mercury toxicity in single events. It's eliminated pretty efficiently.

The problem occurs when mercury exposure is chronic. Then the body begins to harbor it and this leads to subtle health issues (acne, shyness, headaches, thyroid issues) and eventually escalates to major health problems 10 to 30 years later.

The type of hg in tuna is hg-ch3 ,methyl mercury.This type does'nt stay in the brain as long as metalic hg.It's half life is around 90 days.Metalic hg has a half life of many years.