Live Well, Age Well

Protein Needs After 40: Why Protein Matters More as You Age Most people don’t think about protein until they start exercising more or trying to build muscle. But protein becomes increasingly important as we get older, even if your goal is simply to stay healthy and active. Around age 40, the body begins to gradually lose muscle mass in a process called sarcopenia. Without enough protein and physical activity, this muscle loss can accelerate over time. Maintaining muscle is important not just for strength, but also for metabolism, mobility, and long-term health. Why Protein Becomes More Important With Age As we age, the body becomes less efficient at using protein to build and maintain muscle. Researchers call this anabolic resistance. Because of this change, adults over 40 often benefit from slightly higher protein intake compared with younger adults. Protein supports: • muscle maintenance• metabolic health• strength and mobility• bone health• energy and recovery Research from the National Institutes of Health highlights the role of adequate protein intake in preserving muscle and functional health as we age. How Much Protein Do Adults Over 40 Need? Many experts recommend: 1.0–1.4 grams of protein per kilogram of body weight depending on activity level. For example: Body Weight Protein Per Day 140 lb 64–90 g 160 lb 73–102 g 180 lb 82–115 g If you want a simple way to calculate your needs, see our guide on Daily Protein Intake. The Most Common Protein Gap Many people consume the majority of their protein at dinner. Breakfast and lunch are often protein-light, which leaves people short of their daily goal. Simple additions can help: • eggs or yogurt at breakfast• legumes or tofu at lunch• a clean plant-based protein bar between meals Consistency matters more than perfection. The Bottom Line Protein isn’t just about building muscle. It’s about maintaining strength, metabolism, and independence as we age. For many adults over 40, aiming for 1.0–1.4 g/kg per day can help support long-term health and vitality. You can view our guide on Daily Protein Intake here. Many people find they fall short of their daily protein goal. A clean plant-based protein bar can be a convenient way to close that gap between meals. Looking for more? Explore our nutrition guides: Daily Protein Intake · How to Increase Protein Intake · Best Plant-Based Protein Sources · Protein Timing · How Much Protein to Build Muscle