Green Options

This post is going to be another struggle for balance.  The threat from this particular mycotoxin in the food supply is a so large that it makes the risks that worry most people look tame.  It makes the subject of one of my previous posts about another mycotoxin, vomitoxin, look like a virtual non-issue. Aflatoxin is one of the most potent acute toxins known and one of the most carcinogenic.  Because of this the average international tolerance for aflatoxin B1 in food is 4 parts per billion (PPB).  The average tolerance for food for children is 0.2 PPB and for milk 0.05 PPB (USDA ERS publication source for this data).  These are seriously low numbers.  I want to accurately represent the seriousness of this risk.  

At the same time I also want to accurately represent the extent to which the commercial food supply is now protected from that risk.  The same ERS document above reported US crop losses in 2003 from mycotoxins in corn, wheat and peanuts of $932 million and another $466 million for testing.  That is all for preventing this toxin from getting to us. There is a lot going on in the background that few people recognize.

Folks in the food industry may well ask “why even bring it up!?”  First of all, this is no secret.  My Google Alert for “Aflatoxin” sends me articles nearly every day.  Also I raise this issue to try to “calibrate risk.”  I saw an entry in a comment string on another blog the other day where someone wrote, “I hope this is a move towards chemical-free food.”  I’ll give that person the benefit of the doubt that they know that all food is made of chemicals (proteins, fats, carbs…).  Their concern was about synthetic pesticide residues.  I doubt that they know about “chemicals” like aflatoxin.  They should.  It is thousands of times more toxic than a typical pesticide residue.

I need to be very careful in what I say about this topic because it would be easy to scare people beyond what is rational.  I could also also easily make enemies in the Wheat industry which is about the last thing I’d like to do.  I’m going to try to hit the right balance, but it is risky.

Mycotoxins

Most people don’t know that Mycotoxins are a very real issue in our food supply.  These are nasty, natural chemicals that are produced by certain fungi that infect crops. This is not something new.  In Medieval times there was a wide-spread neurological disorder called “Ergotism.” It was caused by mycotoxins in the rye crop produced by a disease called “ergot.” The poor people who lived off of rye, rather than wheat, were disproportionately effected.

Mycotoxins are still an issue today.  2009 has been a particularly bad year for a toxin called “vomitoxin” in wheat, barley and pasta wheat.  Its not a secret, but unless you read the farm press or trade news, you would never know.  Sometime do a Google News search for “vomitoxin.”  If there is rain when these grains are flowering, they can become infected with a fungus called Fusarium graminierum. The disease starts by reducing the farmer’s yields, but it can also produce a toxin in the remaining grain called deoxynivalenol (more commonly called DON toxin).  The trade term, “vomitoxin,” comes from the physical response that animals have if they are fed too much of this contaminated grain (which is obviously not pretty).

Lots of people in America are worried about their food - usually not about having enough food, but mostly about things that might be in their food that could potentially hurt them or their children.  People also worry about the environmental impacts of food production.  At one level I’m glad that people are engaged in this way and I do believe that there are legitimate concerns.   I happen to think that some of the fear about food is misplaced.

I believe that much of this fear stems from a limited understanding of toxicology, molecular genetics, and also what farming is actually about today.  Very few Americans have any real contact with farming.  Frankly, some of this fear is also driven by the activities of businesses and organizations with a vested economic interest in alarming people.

I’ve been working as an agricultural scientist for 32 years.  I’ve had the opportunity to learn about lots of crops grown all over the world.  I’ve been involved with all sorts of different technologies.  I’ve seen huge changes in agriculture over time. So from all of this experience, do I worry about anything to do with food?  Yes, absolutely I do worry! But my list of worries is a little different from the norm