Originally Posted by slowandsteady
the problem with your method, is that 100 calories of lettuce(or other greens) is A LOT of lettuce. One cup of milk = 20 cups of lettuce
Originally Posted by DXchulo
Yeah, and again, 100 calories worth of non-fat yogurt would give 300 mg calcium, putting it pretty high on that list.
You are to hung up on which is more calcium not the concepts of negative calcium balance and increased urinary excretion. Dairy will most likely give you a
NEGATIVE balance of calcium. Say you eat 1,000mg of calcium from your milk, yogurt, cheese ect... You can absorb about 1/3 of that or roughly 300 mg. The remaining 700mg will remain in the digestive tract and pass out with your stool. Because you got your calcium from all animal/dairy products your body will
REMOVE it from your bones (see my other post for why) and eventually you will pee it out something like 350mg of calcium leading to an overall
LOSS OF CALCIUM.
If you eat 500mg of calcium from vegetables you can absorb about 200mg. 300mg will pass out through your stool and you may only pee out 100mg leaving you with a
GAIN of 100mg although you consumed only
half of the calcium for that 24 hour period.
Once again I am not sure what information you are looking for. Are you looking for a good source of calcium or for an excuse to eat dairy?