* What is Gold leaf? Gold leaf is a thin sheet which is made of pure gold. Gold has good ductility and plasticity and is stable in nature. It is
permanently discolored, anti-oxidation, anti-humidity, anti-corrosion, anti-mildew, anti-insect bites, and even anti-radiation. So the leaf foil has a wide range of usages.
* Is really edible or not?
In 1983, the Codex Committee on Food Additives of the World Health Organization officially listed 9999 natural pure gold in the category of food additives as No. 310 of Table A.
The 8th class of minerals and trace elements of the new food resources issued by the Ministry of Health of China clearly defines the edible function of gold foil.
But when selecting gold leaf, make sure to get gold that is as pure as possible. This means it should be 22-24 carats. Gold leaf with a smaller carat value has more impurities and is less safe to eat. If you are careful and buy gold leaf that is clearly labeled as "edible" and has 22-24 carats, eating gold leaf is harmless.