My son is 18 months old now. We started feeding our son cod fish, and occasionally salmon since he was six months old until one year old.

We found out that he was suffering from mercury poisoning during a routine checkup when he was one.

There were no signs or symptoms of mercury poisoning. We casually asked the doctor whether it's okay to feed him cod fish (chilean sea bass) every day since we read that it contains high mercury content.

The doctor said he was not sure, but if we were worried, he could do a mercury test for my son. We found out that my son's mercury level was nearly nine times higher than the allowed level, which is less than 75. His was 622.

After a dose of DMSA (the treatment for mercury poisoning) and a few months of natural healing, his mercury level is now back to the normal range, that is 48.3.

A lot of Malaysian parents are not aware of the danger of mercury poisoning. We were very lucky to discover this even before the symptoms showed. Just imagine if your child is poisoned and you finally find out, say 10 years later when his mental and physical health have been damaged by this poisonous substance.

I strongly recommend parents take their children for a mercury test if they have been feeding their children with cod fish or any deep sea big fish which may have high mercury content.

Early detection and treatment are effective damage control for our precious children. After all, we feed them with expensive fish because we believe it is good for their brain development, right?

A concerned mom