Vitamin C increases non-heme iron absorption 2-6x by reducing Fe3+ (ferric, poorly absorbed) to Fe2+ (ferrous, well absorbed). This pairing is critical for vegetarians, vegans, and anyone with low ferritin.
Best Combinations
Lentils (3.3mg non-heme iron) + red bell pepper (127mg vitamin C/100g — highest food source)
Meal idea: Lentil soup with diced raw bell pepper on top
Spinach (2.7mg iron) + lemon juice (vitamin C + citrate → increases absorption AND reduces oxalate binding)
Meal idea: Spinach salad with lemon vinaigrette
Oats (4.7mg iron/100g) + strawberries (58mg vitamin C/100g)
Meal idea: Overnight oats with sliced strawberries on top
Beans (2.1mg iron) + tomatoes (cooked = more lycopene, raw = more vitamin C)
Meal idea: Black bean bowl with fresh salsa
Tofu (5.4mg iron/100g) + broccoli (89mg vitamin C, but also iron!)
Meal idea: Stir-fried tofu + lightly steamed broccoli
⚠️ What to Avoid at the Same Meal
Coffee/tea (tannins reduce absorption 60-90%), calcium-rich foods (compete for absorption), high-phytate grains without soaking.