Gold foil can be divided into edible gold foil and decorative gold foil. The gold content of decorative gold foil is usually 98%, while the gold content of edible gold foil is as high as 99.9%.
Edible gold foil can be added to wine, cakes, coffee, tea, chafing dish, cooking, condiments, cosmetics, bathing agents, so as to improve the product grade, highlight the luxurious style, increase the festive atmosphere, prolong life and maintain beauty.
Gold foil is allowed to be added to wine as a food additive, and the maximum dosage is 0.02g per kilogram. Pure gold is non-toxic and very stable, and will not react with common acids and bases, such as stomach acid, so it will not be corroded in the body to produce toxic substances. Simply put, it is to drink white wine with gold foil, which will be excreted with feces.
Extended data
China is the first place to eat gold in history. As early as the Qin and Han Dynasties, the rich in China had records of eating gold foil and powder. In modern times, eating gold foil is also very popular in Japan and Southeast Asia.
1983, the Codex Committee of Food Additives of the World Health Organization officially listed 9999 natural pure gold in the category of food additives and named it Tabeano. 3 10.
Edible gold foil, its thickness is only one tenth of a millimeter, and ordinary people have no idea about this thickness. As a metal, it is opaque, but the edible gold foil is so thin that it is transparent to light, so even if it is described as "as thin as a cicada's wing", it is actually much thinner than a cicada's wing, and it will break under the tension of water, making it almost impossible to hold it by hand.
Baidu Encyclopedia: Edible Gold Foil