Fortunately, no! Pure Tung Oil, being a drying oil, does not go rancid. Rather than decomposing like non-drying oils, pure tung oil goes through a polymerization (hardening) process and permanently transforms from an oil to a solid.

Yes! Pure Tung Oil is labeled as food contact safe by the FDA. You can see this classification by clicking here.

Pure Tung Oil is just that, 100% pure tung oil cold-pressed from the seed of the tung tree. Tung Oil Finish is typically a finish that contains pure tung oil but also has other ingredients such as thinners, varnishes, and metallic driers. Pure Tung Oil absorbs into the wood whereas tung oil finishes build on [...]

There are two ways of classifying oils. Some are considered drying and others are considered non-drying. Essentially, drying oils, like tung oil, go through a polymerization process over time and transform from an oil to a solid. Non-drying oils, like mineral oil, never go through a polymerization process and are always in a liquid or [...]

According to Merriam Webster, tung oil is "a pale yellow pungent drying oil obtained from the seeds of tung trees and used chiefly in quick-drying varnishes and paints and as a waterproofing agent."