Unlike olden times, wood finishes no longer have any kind of hazardous ingredients like lead or mercury. This means even if there are a few finishes that are safe for food, the others could also be used. In theory, once fully cured, any finish is okay to eat off of, and the keyword here are the words “fully cured.”
Any finish is usually fully cured in 30 days. The easier way to tell is if you can still smell the finish, it is not cured. There is no hard evidence that proves that regular finishes cause any harm or shouldn’t come in contact with food. Even the food-safe finishes have some solvents that allow thin layers and quick drying time.
So, while specific finishes are labeled safe for food, the others do not have any evidence of being harmful. However, the FDA does have guidelines that layout which can be considered safe. The choice on which to pick is entirely yours.