Table 2.

Comparison of the amount of absorbable calcium in calcium-rich foods

Food	Standard serving sizea (g)	Calcium content/serving (mg)	Calcium absorbed/serving (mg)	Servings needed to equal 240 ml milk
Milk	240	300	96	1.0
Yogurt	240	300	96	1.0
Cheddar cheese	42	303	97	1.0
Tofu with calcium	126	258	80	1.2
Bok choy	85	79	43	2.3
Kale	85	61	30	3.2
Broccoli	71	35	21	4.5
Spinach	85	115	6	16.3
Red beans	172	41	10	9.7
White beans	110	113	25	3.9
Pinto beans	86	45	12	8.1
Rhubarb	120	174	10	9.5

Source Adapted from Weaver 1999 [20]

^a1 serving = 240 ml milk; 42 g (1.5 oz) cheese; 85 g green leafy vegetables