From a quantitative standpoint, mineral oil is probably the largest contaminant of our body. That this contaminant can be tolerated without health concerns in humans has not been proven convincingly.
The current Editorial of the European Journal of Lipid Science and Technology reflects on this and concludes that this proof either has to be provided or we have to take measures to reduce our exposure - from all sources, including cosmetics, pharmaceuticals and the environmental contamination.
In the Ukraine recently around 100,000 tonnes of sunflower oil were contaminated with mineral oil at concentrations often above 1000 mg/kg. Much of the contaminated oil was withdrawn, but there are products on the market which were produced before this contamination was detected; and this autumn there are still several 10,000 tonnes of contaminated oil in the Ukraine and other parts of the world. To protect consumers, a broad analytical campaign was initiated throughout Europe. The European Commission decided to apply a legal limit of 50 mg/kg to the mineral paraffins in Ukrainian sunflower oil and in September 2008 it organized a workshop together with the Official Food Control Authority of Zurich, Switzerland, to promote this campaign.