Nutrition and Advantages Eating edible gold leaf is safe as long as it is properly labeled as "edible" and contains between 22 and 24 carats. (The higher number is for gold plated items.) People who are allergic to metals may have a reaction if they eat enough gold leaf to contain any traces of mercury or other elements in the metal. Safety The main danger of eating gold leaf is that it could contain substances such as mercury which are toxic if consumed. Other possible toxins include aluminum, arsenic, cadmium, chromium, copper, iron, lead, nickel, silver, and zinc. If you have allergies to foods such as nuts, spices, or vegetables, be sure to read labels carefully before buying products that contain gold leaf. Storage Edible gold leaf should be stored in a dry place away from direct sunlight. It will keep for about one year if wrapped in plastic wrap or placed in an airtight container.