Wednesday, October 1, 2008

Melamine Contaminated Milk

From Science Base:

A brief summary and update to the Sciencebase original posts on Melamine in Milk and Melamine Scandal Widens.

Dairy farmers have been feeling the squeeze for years, particularly in parts of the world where technological advancement has been slow in coming and so their profit margins on their milk output have not been lifted by improved efficiency. In order to boost profits milk has been diluted. However, this brings with it the problem of falling quality - dilute with water and measurable concentrations of milk proteins, fats, and sugars fall. Dilution by up to 30% has not been uncommon, which is where melamine (as I’ve mentioned) comes in. Melamine is a small organic molecule with a high nitrogen content that can easily fool the quality control equipment into thinking that nitrogen (from protein) is present at normal levels and so the milk is passed as good.

Unfortunately, it is possible that melamine accumulates in the body and causes toxicity problemsmelamine accumulates in the body and causes toxicity problems - basically damaging the kidneys and forming stones (solid deposits within the kidneys or bladder). Infants fed regularly with milk containing melamine will be particularly susceptible to these effects. As we have seen tens of thousands have been affected and several have died in China. Why this problem is not more widespread, given the rather large number of infants potentially having been drinking contaminated formula-milk for months is unclear.

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