Grass-fed beef and grain-fed beef differ mainly in fat composition and micronutrient profile, not in basic protein quality, as both provide high-quality complete protein. Grass-fed beef generally contains more omega-3 fatty acids, higher levels of antioxidants like vitamin E, and more conjugated linoleic acid (CLA), while being slightly leaner with less total fat. Grain-fed beef is usually more marbled, higher in overall fat (especially omega-6), and tends to be more tender and widely available. In terms of health, grass-fed beef is often considered better for heart health and inflammation balance due to its improved omega-3 to omega-6 ratio, though both can fit into a healthy diet when eaten in moderation. Overall, grass-fed is often preferred for long-term wellness and anti-inflammatory benefits, while grain-fed is more affordable and calorie-dense.