Fish and protein foods are the building blocks your body uses to build and repair muscles, make hormones, and keep your immune system working. This category covers the main protein sources people eat—fish, poultry, meat, eggs, beans, nuts, and plant-based options—and what makes each one different nutritionally. Whether you're learning about protein for the first time or trying to understand which foods fit your diet, these guides explain what's actually in these foods and how they work in your body.

The articles here answer practical questions: How much protein do you actually need? What's the difference between animal and plant proteins? Which fish are safest to eat regularly? How do beans and nuts compare to meat? You'll find information about nutrients like iron and omega-3s, how to read labels, and how different protein sources fit into various eating patterns.