Does pulling (hold in a liquid in you mouth and rinsing it around) on sunflower oil really do you any good? Just because it changes color does it mean that this has taken away toxic substances?
I have had personal success with oil pulling AND think the usual explications that I read are garbage.
But, I have an alternative explanation.
I have worked as a compounding pharmacy technician and one of the great ways to boost the buccal absorption of drugs is to arrange to have them be suspended in an oil or an alcohol.
Now, where they are talking about drugs, we might want to consider the uptake oil of fat nutrients that may help with conditions like sinus difficulties.
My theory is that the buccal swishing of oils (for the 10-20 minutes usually advocated) allows us to absorb some factors from the oil that would be lessened or destroyed by the digestive tracts processing.
If it was purely a mechanical action, then doing this with water should have the same effect.