 Palm oil is the most commonly used vegetable oil in the world today. Pick up any package or process junk in a box, bag, bottle or jar, and odds are it'll have palm oil. Not only does it contain the primary cholesterol-raising saturated fat found mostly in meat and dairy, concerns have been raised about the safety of palm oil given the finding that it may contain a potentially toxic chemical contaminant known as 3-monochloropropane-1-2-dial, otherwise known as 3-MCPD, which is formed during the heat treatment involved in the refining of vegetable oils. So these contaminants end up being widespread in refined vegetable oils and fats in any products that contain them, including infant formulas. It's been found in all refined vegetable oils, but some are worse than others. The lowest levels of the toxic contaminants were found in canola oil and the highest levels in palm oil. Based on the available data, this may result in a significant amount of human exposure, especially when used at deep-fries salty foods like French fries. In fact, just five fries could blow through the tolerable daily intake. Now, if you'd just do this once in a while, it shouldn't be a problem, but if you're eating fries every day or so, this could definitely be a health concern. Because the daily upper limit is based on body weight, particularly high exposure values were calculated for infants who were on formula rather than breast milk, and this formula is made from refined oils, which, according to the European Food Safety Authority, may present a health risk. And estimated U.S. infant exposures may be three to four times worse. If infants don't get breast milk, there's basically no alternative to industrial-produced infant formula. Given that fact, the vegetable oil industry needs to find a way to reduce the levels of these contaminants, and in the meanwhile, this is yet another reason that breast is always best. What can adults do to avoid exposure? Well, if these chemicals are created in the refining process of oils, what about sticking to unrefined oils? Refined oils have up to 32 times the 3 MCPD compared to their non-refined counterparts, with the exception of toasted sesame oil. Sesame oil is unrefined, they just squeeze the seeds, but because they're squeezing toasted sesame, the 3 MCPD may have come preformed. Virgin oils are by definition unrefined, they haven't been deodorized, the process by which most of the 3 MCPD is formed. In fact, that's how you can discriminate between the various processing grades of olive oil. If your so-called extra virgin olive oil contains MCPD, then it must have been diluted with some refined olive oil. The ease of adultering extra virgin olive oil, the difficulty of detection, the economic drivers, and the lack of control measures contribute to the susceptibility of extra virgin olive oil to fraud. How widespread a problem is it? Of the 88 bottles off store shelves tested, labeled extra virgin olive oil, only 33 were found to be authentic. OK, but what if you stick to the top-selling imported brands of extra virgin olive oil? 73% of those samples failed. Only about 1 in 4 appeared to be genuine, and not a single brand had even half their samples passed the test.