The following are excerpts, full article here: Osteoporosis information – Second Opinions, UK.
Dietary causes of osteoporosis:
Bran; cereal fiber; soy; vegetarian diet; low intake of meat; fizzy drinks (sodas).
(Inserted by iseektruth: Another MAJOR cause is TOO MUCH CALCIUM and not enough MAGNESIUM in the diet.)
“Bone might appear to be static, but it is a living tissue which undergoes constant renewal and replacement. At any given time, in every one of us, there are up to ten million sites where small segments of old bone are being dissolved and new bone is being laid down to replace it.
Bone-forming cells are of two different kinds: osteoclasts and osteoblasts. The job of osteoclasts is to find old bone that is in need of renewal: they dissolve bone and leave behind tiny unfilled spaces. Osteoblast cells then move into these spaces in order to build new bone. In this way, bone heals and renews itself in a process called remodelling. It is imbalances in this remodelling process that contribute to osteoporosis: when more old bone is eaten up than new bone is laid down, bone loss occurs.
The process of remodelling continues throughout our lives. But after the age of about fifty, although the rate increases, the bone-building osteoblasts become less and less capable of completely refilling the spaces made by the osteoclasts.
The correct term for low bone density is osteopenia. And density is only one factor in osteoporosis and the fractures that result from it. Another factor which tends to be forgotten is the micro-architecture of the bone. As osteoclasts absorb more bone than is rebuilt, the micro-architecture becomes fragile. As it weakens, the wrist and hip become more vulnerable to fracture. Vertebrae don’t really fracture or crack, they collapse, causing loss of height, and if enough vertebrae collapse, a ‘dowager’s’ hump is created.”
“Osteoporosis really has two components: bone density and micro-architecture. But all we hear about is bone density; micro-architecture is virtually ignored. This is probably because only bone density can be measured. But just measuring bone density can be misleading, for not everyone with low bone density will get fractures. Asian women, for example, tend to have low bone density yet have very few bone fractures; and if you have had a high intake of fluoride, your bone density will be higher — but so will your fracture risk because fluoride is more brittle!”
Protein and bone health
“In certain sections of the nutritional world, there seems to be a belief that if we eat animal protein this will cause our bones to lose calcium. This question is of particular interest in light of Palaeolithic diet research for two reasons: The first is because estimates of the levels of animal protein in the hominid diet during at least the last 1.7 million years of human evolution (from the time of Homo erectus) are much higher than considered prudent in some sectors of the nutritional research community today; the second is because the fossil evidence shows that Palaeolithic humans had a higher bone mass that would have been more robust and fracture-resistant than modern Western humans’ bones.
Studies published in the 1980s of people eating a high-protein diet have also detected no calcium loss even over a long period of time, provided that meat is eaten with its fat. And subsequent studies confirmed that:
- meat eating does not adversely affect calcium balance.
- protein actually promotes stronger bones.
- men and women who eat the most animal protein have better bone mass than those who avoid it.
Increasing protein intake also helped elderly patients who were taking vitamin D and calcium supplements. Drs B. Dawson-Hughes and S. S. Harris of the Calcium and Bone Metabolism Laboratory, Tufts University, Boston, Massachusetts, tested associations between protein intake and change in bone mass density in 342 healthy men and women aged 65 or over who had completed a 3-year, randomised, placebo-controlled trial of calcium and vitamin D supplementation. They found that higher protein intake was significantly associated with a favourable 3-year change in total-body bone mass density in the supplemented group but not in the placebo group.
Protein powders are the culprit proteins
What is significant in the various studies of protein intake and bone density is that the studies which purported to show protein intake caused calcium loss were not conducted with real foods but with isolated amino acids and fractionated protein powders of the sort used by low-carb dieters and athletes. The reason why these amino acids and fat-free protein powders caused calcium loss while the fat meat diet did not is because protein, calcium, and minerals require the fat-soluble vitamins A and D for their assimilation and utilisation by the body. When protein is consumed without these factors it upsets the normal biochemistry of the body and mineral loss results. True vitamin A and full-complex vitamin D are only found in animal fats. Furthermore, saturated fats that are present with meat are essential for proper calcium deposition in the bones. It should be no surprise, therefore that vegan diets have been shown to place women at the greatest risk for osteoporosis.”
Full article here: