If you are in a jam and it is going to take a month to get the liquid sunflower lecithin ,i would opt for the liquid soy , cancer unfortunately is not going to wait.. maybe try some tacking of the CCO in the meantime or make suppositories out of cocoa butter . But you really should start getting the oil into your father’s system.. . I am sure a month of taking minuscules of soy lecithin is not going to have any adverse affects to your father’s cancerBoy, I don't know. I got mine on The River. I think Sue was pretty adamant about using the sunflower and not the soy based version because almost all soy is now gmo which is not what we want when trying heal our bodies.