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metabolism
Enzymes are proteins that facilitate chemical reactions in living organisms. In fact, they are required for every single chemical action that takes place in your body. All of your cells, organs, bones, muscles, and tissues are run by enzymes. Digestive Enzymes
Speaking of meatballs, what's the deal with meatball sandwich? How can people eat those? It's ROUND. Trying to bite those in a sandwich is a challenge. It's easier to eat a burger stacked with toppings.