Vitamin C with iron → Vitamin C boosts non-heme iron absorption. • Vitamins A/D/E/K with a meal → These are fat-soluble vitamins, so they’re absorbed better with dietary fat. • Magnesium with vitamin D → Magnesium is a cofactor needed for vitamin D activation. • Turmeric with black pepper → Piperine in black pepper increases turmeric (curcumin) bioavailability. • Folate with vitamin B12 → These vitamins work together in methylation and red blood cell production. • Vitamin D with K2 (Mk7) → Vitam