Most vegetables contain a small amount of calcium. Because calcium can hinder the body’s absorption of dietary iron, people with iron deficiency anemia or a high risk of this deficiency may need to limit their intake of calcium at meals when they get iron from food or take iron supplements. Choosing low-calcium or calcium-free vegetables may promote better absorption.
Sweet Corn
Sweet corn contains no calcium. A 90-calorie serving, or the kernels from one medium ear of corn, provides 250 milligrams of potassium, 4 grams of protein, 10 percent of the recommended daily vitamin C intake and 2 percent of the recommended daily vitamin A and iron intake. This serving contains 18 grams of carbohydrates, including 2 grams of dietary fiber and 5 grams of sugar.
Mushrooms
Mushrooms also contain no calcium. A 20-calorie serving, or five medium mushrooms, provides 300 milligrams of potassium, 3 grams of protein and 2 percent of the recommended daily vitamin C and iron intake. This serving contains only 3 grams of carbohydrates, including 1 gram of dietary fiber and no sugar.
Bell Pepper
Bell peppers contain only a small amount of calcium. A 25-calorie serving, or one medium bell pepper, contains only 2 percent of the recommended daily calcium intake. This serving also contains 190 percent of the recommended daily intake of vitamin C, a nutrient that promotes better absorption of dietary iron. This serving contains only 6 grams of carbohydrates, including 2 grams of fiber and 4 grams of sugar, and provides 220 milligrams of potassium, 1 gram of protein and 4 percent of the recommended daily intake of vitamin A and iron.
Cauliflower
A 25-calorie serving of cauliflower, or one-sixth of a medium head, contains only 2 percent of the recommended daily calcium intake. This serving contains only 5 grams of carbohydrates, including 2 grams of fiber and 2 grams of sugar, and provides 270 milligrams of potassium, 2 grams of protein and 100 percent of the recommended daily vitamin C intake.
Other Vegetables
Other vegetables that contain only 2 percent of the recommended daily calcium intake per serving include asparagus, carrots, cucumber, green onions, iceberg lettuce, leaf lettuce, potatoes, radishes, summer squash and tomatoes. Vegetables rich in calcium include spinach, turnip greens, kale and broccoli.
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