Best Pure Vegetable Glycerin 16oz. Non-GMO, USP Grade - Amazing Benefits for Hair & Skin - Excellent Emollient Qualities

The product descriptions says its food grade, but no where on the bottle does it say this, is this safe to use for making tintures?

I see the answer "yes it is food grade" But I also see an answer that says to not use it for vaping because it is "external use only." So which is it?

what is the vegetable base? Soy or Palm or what?

Is this for cooking, or not? Description indicates that it is, not labeled for consumption. Thanks! :)