I want to mention again why I buy ORGANIC Sunflower oil.
Fields of Sunflowers, like Rapeseed, have become a common sight in the countryside in recent years, however I'm not 100% sure if my observations of them growing in France apply everywhere.
Where I live in France, the 'ripened' Sunflower heads are artificially readied for harvest. Rather than let time and sunshine prepare them, they are sprayed with what one farmer friend described as 'a derivative of Agent Orange'. In other words a very nasty chemical. This instantly kills off the plants, which in turn loosens the seeds from the heads, making for a heavier harvest when being 'combined'.
I don't know of any other oil producing seed that is treated similarly.
As soon as I heard about this chemical treatment, I stopped buying ordinary Sunflower oil, and have always bought 'organic' instead. I don't always buy organic products, but in this particular case I shall always do so, and I recommend that you do so too.
Whatever they say, some of this horrible poison must get into the oil. I'm not taking chances. Best to be on the safe side!