Dr. Davis also cites a University of Toronto study that showed increased gluten intake
increased urinary calcium loss by 63 %, along with increased markers for bone weakening.
Increased urinary calcium may also lead to kidney stones, a condition in which hard calcium masses form in the kidneys.
Her professors or instructors are saying that high dietary protein
increases urinary calcium excretion, and then they make the assumption that, therefore, it's bad for bone health, but that's only part of the puzzle, and they're not understanding the increase in intestinal absorption of calcium that animal protein and protein in general leads to.
An acidic diet may not affect the blood pH much, but can decrease urinary magnesium levels, urinary citrate and pH, while
increasing urinary calcium, undissociated uric acid, and phosphate.
Calcitonin inhibits PTH secretion, decreases both bone resorption and intestinal calcium absorption, and
increases urinary calcium excretion (Figure 1).
Not exact matches
a)
increased protein intake from animal sources (milk and meat) lead to significant
increases in
urinary calcium excretion.
Conversely, individuals who've already experienced a
urinary tract stone might avoid
calcium to help avoid a subsequent stone and inadvertently
increase their osteoporosis risk, the researchers write.
A beneficial juice for individuals prone to recurrent kidney stones is cranberry juice, which has been shown to reduce the amount of ionized
calcium in urine by about 50 percent in patients with kidney stones (high
urinary calcium levels greatly
increase the risk of developing a kidney stone).
When combined with high levels of
urinary calcium, there is an
increased risk of
calcium oxalate kidney stone formation.»
It has been shown that small amounts of aluminum - containing antacids
increase the
urinary and fecal excretion of
calcium, inhibit absorption of fluoride, and inhibit absorption of phosphorus, creating a negative
calcium balance.
However, an
increase of the risk of
calcium phosphate stone formation was observed in patients with multiepisodic CaOx - urolithiasis» however they conclude that bicarbonate water can be recommended for helping
calcium oxalate and uric acid
urinary stones.
A study published in the British Journal of Nutrition found that when women drank 1/2 to 1 liter of grapefruit, apple or orange juice daily, their
urinary pH value and citric acid excretion
increased, significantly dropping their risk of forming
calcium oxalate stones.
The old thinking would predict that then there would be no
calcium loss since there is no excess acid to buffer, but no, even though the acid load was neutralized there was still the excess
urinary calcium, consistent with the radioactive isotope study, «challenging the long - standing dogma that animal protein consumption results in an acidosis that promotes the
increased excretion of
calcium....
Unexpected observations were a prominent reduction in
urinary calcium excretion from the run - in to the intervention phase with the fruits - and - vegetables diet and no
increase in
calcium excretion with the combination diet.
This pattern of findings can potentially be explained by the high fiber content of these two diets, which may have impeded
calcium absorption.22 Nonetheless, the substantial
increase in
urinary phosphorus excretion with the combination diet suggests that the subjects in this group did consume more dairy products than the other participants.
These
increase calcium absorption and deposition, while reducing
urinary calcium excretion.
Increasing dietary protein intake enhances intestinal
calcium absorption, as well as
urinary calcium excretion (9).
It was initially thought that high - protein diets may result in a negative
calcium balance (when the sum of
urinary and fecal
calcium excretion becomes greater than
calcium intake) and thus
increase bone loss (11).
In the kidneys, PTH stimulates the conversion of vitamin D into its active form (1,25 - dihydroxyvitamin D; calcitriol), which rapidly decreases
urinary excretion of
calcium but
increases urinary excretion of phosphorus.
Excessive
calcium supplementation is associated with the development of canine hip dysplasia and may
increase the risk of
calcium oxalate stone development in the
urinary tract.
There are a number of causes and risk factors that may contribute to their development; eg: the oversaturation of stone - forming materials in the dog's urine or
increased levels of
calcium in the urine and blood, and diets that produce high pH (alkaline) urine, and recurrent
urinary tract infections.
Because of the
increased calcium excretion brought on by furosemide (i.e. an
increase in
urinary calcium levels), there could be a problem using this medication in patients with a history of
calcium oxalate bladder stone formation.
Urinary Tract Health Formulated to
increase the urine volume and help in the management of both struvite and
calcium oxalate crystals through the use of Relative Supersaturation (RSS) methodology.
After 1 month on the treatment diet, intakes of moisture, sodium and fat were
increased, and potassium and
calcium intakes were decreased, and
urinary calcium and oxalate concentrations and
calcium oxalate RSS were decreased (Stevenson et al. 2004).
I believe that the dramatic
increase in the rate of
calcium oxalate
urinary stones is likely only one of them.
Urinary oxalate
increased, although inconsistently, with dietary oxalic acid only when the dietary
calcium content was low (Stevenson et al. 2003a).
The cascade of events leading to
calcium oxalate stone formation is largely unknown, but there is some indication that normal
increases in
urinary calcium concentration after feeding could be involved in stone formation.
They can cause a host of adverse effects including
increased appetite,
increased water consumption, personality change, panting, pacing,
urinary accidents, bleeding ulcers, diarrhea, thinning of the skin,
calcium deposition in the skin, heart disease, diabetes, liver disease, seizures, and suppression of other glands such as the thyroid, pituitary and adrenal glands.
I believe that the dramatic
increase in the rate of
calcium oxalate
urinary stones is likely one of them.