Proteins do everything.
They think our thoughts, remember our memories, shoot our hoops, enjoy our music. They make our bodies, every organ in our bodies, every tissue and cell in those organs, and every functioning part inside every cell in our body. Proteins make the carbohydrates and fats that our bodies use, they break them down and rebuild them depending on what our bodies need. They make the hormones and use the vitamins. Yes, proteins do everything.