Protein supplements, like all supplements, are for when you're falling short of your nutritional goals after accounting for your normal food intake. If you're g

Protein supplements, like all supplements, are for when you're falling short of your nutritional goals after accounting for your normal food intake. If you're getting enough protein through meals, then there is no need. Many people who lift weights try to achieve about 1g of protein per pound of bodyweight, which can be a lot. Protein supplements make that number easier to hit. Beyond that, there is little to no evidence that getting protein via a supplement is better or worse than through food sources. It is simply more convenient.