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One of the hardest things to do when building muscle is eating enough protein. Sure, you could cook 10 chicken breasts a week or whip up eggs every other meal...or, instead, you could nosh on a protein bar and or chug a shake. Thanks to prime day, you can now do the former for a good deal cheaper. Whether you're a lover of whey-packed cookie-dough monstrosities, or prefer plant-based protein — you can find it all here.
