<p>Which foods actually make a difference? Here are the <strong>7 with the strongest evidence</strong>:</p><p><strong>1. Oranges & Citrus</strong> — Vitamin C boosts collagen. <strong>2. Wild Salmon</strong> — Omega-3s reduce inflammation. <strong>3. Avocado</strong> — Vitamin E works synergistically with Vitamin C. <strong>4. Sweet Potatoes</strong> — Beta-carotene is food-based retinol. <strong>5. Green Tea</strong> — Catechins protect against sun damage. <strong>6. Walnuts</strong> — Best plant source of omega-3s. <strong>7. Dark Leafy Greens</strong> — Vitamins A, C, K for cell turnover.</p>