What it does: Protein supports muscle growth and repair, tissue maintenance, immune defense, and is required for making enzymes and hormones in the body.
How it is used: People use protein supplements to help build and recover muscle, support exercise performance, manage weight, or compensate for dietary protein gaps.
Natural sources and supplement forms: Protein occurs naturally in meats, fish, eggs, dairy, beans, nuts, soy, and some grains. Supplemental forms include whey, casein, soy, pea, rice, hemp, and collagen, usually provided as powders, bars, or drinks.
Why it appears in supplement formulas: Protein sources are added to supplements to offer a convenient way to increase protein intake for athletes, those with higher needs, or individuals with restricted diets.
What to know before use: High protein intake may not be suitable for those with kidney issues; consult a healthcare provider if you have concerns or medical conditions.
Proteins Are Built From 20 Different Amino Acids
All protein sources—whether they come from plants, dairy, meat, or eggs—are made up of long chains built from 20 different amino acids. Your body uses these amino acids in unique combinations to build and repair tissues, produce hormones, and support key functions. Some amino acids must be supplied by your diet, making quality protein sources especially important.
