How is it possible for gold to be edible?

Technically a lot of foods we eat have soluble metals. That stuff is so paper thin it won't harm your digestive tract. And it's kind of cool to say you're eating gold. It's becoming a fairly common albeit expensive garnish at some top notch places.

You would be surprised at what the human intestine is capable of digesting, and also what the human species needs in the diet.

Minerals in order of abundance in the human body include the seven major minerals calcium, phosphorus, potassium, sulfur, sodium, chlorine, and magnesium. Important "trace" or minor minerals, necessary for mammalian life, include iron, cobalt, copper, zinc, molybdenum, iodine, and selenium -wiki

It makes your dookie twinkle.