11 High-Protein Snack Ideas, Straight From Dietitians

Whether you enjoy them in a trail mix or eat them right out of the shell, pistachios are a great protein-rich snack to pack in your work or gym bag, says registered dietitian Lauren Manaker, MS, RDN, LDN. Pistachios contain all essential amino acids (the building blocks of protein), making them a complete protein source, Manaker says. In addition to being a high-protein snack, pistachios are also a good source of fiber, vitamin B6, phosphorus, thiamin, and copper, she says.