The question “what contains ferritin?” is usually asked with the intention of finding out what to consume in order to raise ferritin. Medically speaking, ferritin is not a nutrient that is directly eaten; it reflects the body’s stored iron. So the real focus is not to find products that literally contain ferritin, but to identify foods and nutrients that provide iron and support iron absorption. Red meat, organ meats, eggs, fish, poultry, legumes, dark leafy greens, tahini, molasses, and some nuts can all be relevant in this context. Foods rich in vitamin C may further improve the absorption of plant-based iron. The correct framework is this: ferritin is not something you consume directly, but something the body builds as an iron-storage marker. The better question is what supports ferritin stores, not what contains ferritin itself.