Is there formaldehyde in lubricating butter at high temperature?

Lubricating butter has formaldehyde at high temperature.

General oily coatings all contain formaldehyde.

Method for judging whether there is formaldehyde:

By the way, if there is a pungent smell, it means it contains formaldehyde.

Use a formaldehyde detector.

Where butter is lubricated, tropical fish are raised. If the tropical fish died without cause, the formaldehyde exceeded the standard.

Plant green plants where lubricating butter has been used. If plants turn yellow easily, formaldehyde will exceed the standard.

Tip: many things have formaldehyde, but formaldehyde does not exceed the standard and will not affect the body.