Liver, particularly beef liver, is exceptionally high in iron. A 3-ounce serving of beef liver can contain up to five times more iron than spinach.
Oysters are rich in various nutrients, including iron. They contain more iron per serving than spinach. A small serving of oysters can provide a substantial amount of the daily recommended intake of iron.
Lentils are legumes that are high in iron and other essential nutrients. They contain more iron than spinach when compared gram for gram.
A type of blue-green algae, spirulina is a highly nutrient-dense food that is richer in iron than spinach. It's available in powdered form and often used as a supplement.
Pumpkin seeds, also known as pepitas, are a good source of iron. They contain more iron per serving than spinach and are also rich in other minerals.
Quinoa is a versatile grain-like seed that contains a considerable amount of iron, making it a great iron-rich alternative to spinach.
Surprisingly, dark chocolate contains a fair amount of iron. However, it should be consumed in moderation due to its high-calorie content.
Tofu, made from soybeans, is an excellent plant-based source of iron. It contains more iron than spinach and is a staple in vegetarian and vegan diets.