Protein affecting Calcium absorption?

Hey, there have been a few articles on this. Here is one that I think explains it well:

https://www.msu.edu/~corcora5/food/vegan/calcium+p...

The relevant part is under the second heading, "What Every Future Physician Should Know About Calcium and Animal Protein"

At the bottom there are also a list of references (citations 6 onwards) which will lead you to other articles

x

Depends on the person. We do know that 50% of our bones is protein by volume. But the studies aren't very compelling either way. This one, for example, concludes:

"In conclusion, the impact of dietary protein on the skeleton appears to be favorable in older subjects who are meeting their dietary calcium requirements but not in those with lower calcium intakes. The optimal protein intake for bone health in the elderly needs to be determined, and this determination should be made in subjects who are meeting the dietary calcium requirement."

http://jn.nutrition.org/content/133/3/852S.full

Another: "More persuasive is the outcome of randomized controlled trials showing that augmented protein intakes, rather than being harmful, substantially improve recovery after hip fracture and reduce age-related bone loss in the contralateral hip (5, 6). "

http://www.ajcn.org/content/75/4/609.full

All seem to agree that people should consume plenty of calcium and protein (high quality, complete protein). Osteoporosis is a serious disease. Our bones grow until we're about 30 years old, then it's a battle for most women to keep them strong and healthy. If you don't grow good bones in that first 30 years, if you skimp on protein and calcium, you may be in for an uncomfortable old age.

Yes, animal protein pulls calcium out of the bones. Ironically, milk can actually cause osteoporosis.