Among the many ways to cook eggs, several cooking sprays have different properties. It would be best if you avoided those that contain propellants, like butane or propane, because these can damage the yolks. For this reason, you should buy a nonstick cooking spray that contains no propellants. An excellent alternative to butter is a premium oil spray.
The best duck fat spray for cooking is made from 100% recyclable materials in the USA. It comes from the French diet, where the people are thinner than Americans but suffer from half the amount of heart problems. Since duck fat is also gluten-free and has a high smoke point, it is considered a healthier option. Unlike butter, duck fat is not prone to rancidity, needs no refrigeration, and has a long shelf life.