Protein is arguably the most important macronutrient, by macronutrient I mean protein, carbs, and fats.
Why is protein so important? Protein is broken down into amino acids in the body. We use these amino acids for nearly every function in our body-from creating hormones to rebuilding tissue.
Eating a sufficient amount of protein also helps you stay full because protein activates satiety hormone release. (The hormones that make you feel full and satisfied.)
Protein can even help with building lean muscle, healthy skin, hair, and nails.
Aim for about one fist size of protein each meal. Or about 15-20g for ladies and 20-30g for men. If your goal is to put on muscle, protein intake will be more.