Is baking stainless steel healthy or tin foil healthy?

The main function of tin foil is to better heat transfer, wrap food, and make food heated more evenly and cooked more easily during barbecue. It's not that tin foil is healthier than stainless steel.

In fact, mineral oil, a processing aid used on the surface of tin foil in the manufacturing process, will volatilize after being heated. Is it harmful?

Look at the introduction: the base oil extracted from petroleum by physical distillation is called mineral oil, and the processing flow is that in the process of crude oil extraction, useful light substances are fractionated, and the remaining base oil is refined (called the old three sets (solvent refining, ketone-benzene dewaxing, clay supplementary refining)). The two main steps are solvent refining to remove non-ideal components such as aromatic hydrocarbons and solvent dewaxing to ensure the low-temperature fluidity of base oil. The production process is mainly physical and does not change the hydrocarbon structure. The base oil produced depends on the content and properties of ideal components in raw materials. Mineral oil has a high flow point and is not suitable for cold zone operation, because it can't clean the impurities contained in it during refining. Therefore, mineral oil base oil is limited in nature. Main uses: used for manufacturing washing powder, synthetic detergent, synthetic petroleum protein, pesticide emulsifier, etc.

I hope the above answers are helpful to your choice.