Only boards with very low formaldehyde content and no harm to household life do not have true "zero formaldehyde". The industry often uses the edible grade to describe the superiority of the environmental protection performance of the board, but it does not mean that the board can be eaten directly, and the chemical components and bacteria contained in it may cause harm to the human body.
Conclusion: There is no real "zero formaldehyde" plate, and it is not advisable to eat it directly. Eating boards, drinking glue, boiling water, etc. are more gimmicks than actual meanings.