New Study Shows This Protein Is Crucial For Building Muscle & Losing Fat

Registered Dietitian Nutritionist Image by Rawpixel / iStock January 23, 2026 Protein plays a central role in metabolic health—not only by supporting muscle, but because muscle helps regulate blood sugar, insulin sensitivity, and resting energy expenditure.* Still, questions remain about which protein sources matter most and whether supplementation actually makes a meaningful difference for most…