I can't imagine that soybean oil would have any adverse effects, but I'm still a novice at this, so my response is more of a support thingy, I suppose. :)

there is a general avoidance of soy in general simply because most of it grown in the US is genetically modified and drenched in herbicides and pesticides.

the oil you are using is refined. i would say that for pulling purposes, it is way better than not pulling.

since you are so determined to keep pulling, you must be getting some benefit. can we get a witness?