Yogurt, plain, low fat, 8 ounces 415
cheddar cheese, 1.5 ounces 307
Milk, whole, 8 ounces 276
Turnip greens, boiled, ½ cup 99
Broccoli, raw, ½ cup 21
Figures from the National Institutes of Health.
Additional reading about the importance of calcium or the lack there of from the NIH
In the critically ill patient calcium, magnesium and phosphate metabolism, are often disturbed with an alteration in intake, increased liberation from bone and damaged tissue and reduced excretion (e.g. during renal failure), causing alterations in extracellular concentrations and subsequent disordered organ function.